Home / 420,767.40-631,156.67-140,284.74

Finding the Fourth Proportional to 420,767.40, 631,156.67 and 140,284.74

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Solution

The fourth proportional to 420,767.40, 631,156.67 and 140,284.74 is: 210,428.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,767.40 : 631,156.67 = 140,284.74 : x
  2. Step 2: Convert to fraction form
    420,767.40/631,156.67 = 140,284.74/x
  3. Step 3: Cross multiply
    420,767.40x = 631,156.67 × 140,284.74
  4. Step 4: Simplify right side
    420,767.40x = 88,541,646,194.43
  5. Step 5: Solve for x
    x = 88,541,646,194.43/420,767.40
  6. Step 6: Final answer
    x = 210,428.96

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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.