Home / 1,121,282.40-1,681,405.20-489,871.20

Finding the Fourth Proportional to 1,121,282.40, 1,681,405.20 and 489,871.20

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Solution

The fourth proportional to 1,121,282.40, 1,681,405.20 and 489,871.20 is: 734,580.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,282.40 : 1,681,405.20 = 489,871.20 : x
  2. Step 2: Convert to fraction form
    1,121,282.40/1,681,405.20 = 489,871.20/x
  3. Step 3: Cross multiply
    1,121,282.40x = 1,681,405.20 × 489,871.20
  4. Step 4: Simplify right side
    1,121,282.40x = 823,671,983,010.24
  5. Step 5: Solve for x
    x = 823,671,983,010.24/1,121,282.40
  6. Step 6: Final answer
    x = 734,580.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.