Home / 715,800.33-987,823.28-393,518.54

Finding the Fourth Proportional to 715,800.33, 987,823.28 and 393,518.54

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Solution

The fourth proportional to 715,800.33, 987,823.28 and 393,518.54 is: 543,065.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,800.33 : 987,823.28 = 393,518.54 : x
  2. Step 2: Convert to fraction form
    715,800.33/987,823.28 = 393,518.54/x
  3. Step 3: Cross multiply
    715,800.33x = 987,823.28 × 393,518.54
  4. Step 4: Simplify right side
    715,800.33x = 388,726,778,376.97
  5. Step 5: Solve for x
    x = 388,726,778,376.97/715,800.33
  6. Step 6: Final answer
    x = 543,065.94

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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.