Home / 776,496.23-1,071,400.07-489,850.19

Finding the Fourth Proportional to 776,496.23, 1,071,400.07 and 489,850.19

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Solution

The fourth proportional to 776,496.23, 1,071,400.07 and 489,850.19 is: 675,889.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,496.23 : 1,071,400.07 = 489,850.19 : x
  2. Step 2: Convert to fraction form
    776,496.23/1,071,400.07 = 489,850.19/x
  3. Step 3: Cross multiply
    776,496.23x = 1,071,400.07 × 489,850.19
  4. Step 4: Simplify right side
    776,496.23x = 524,825,527,855.51
  5. Step 5: Solve for x
    x = 524,825,527,855.51/776,496.23
  6. Step 6: Final answer
    x = 675,889.34

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Half scale
Find fourth proportional to 1,552,992.46, 2,142,800.14 and 979,700.38
Double scale
Find fourth proportional to 776,497.23, 1,071,401.45 and 489,851.19
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.