Home / 420,766.89-631,155.92-140,284.23

Finding the Fourth Proportional to 420,766.89, 631,155.92 and 140,284.23

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Solution

The fourth proportional to 420,766.89, 631,155.92 and 140,284.23 is: 210,428.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,766.89 : 631,155.92 = 140,284.23 : x
  2. Step 2: Convert to fraction form
    420,766.89/631,155.92 = 140,284.23/x
  3. Step 3: Cross multiply
    420,766.89x = 631,155.92 × 140,284.23
  4. Step 4: Simplify right side
    420,766.89x = 88,541,223,825.03
  5. Step 5: Solve for x
    x = 88,541,223,825.03/420,766.89
  6. Step 6: Final answer
    x = 210,428.21

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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.