Home / 420,767.15-631,156.30-140,284.49

Finding the Fourth Proportional to 420,767.15, 631,156.30 and 140,284.49

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Solution

The fourth proportional to 420,767.15, 631,156.30 and 140,284.49 is: 210,428.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,767.15 : 631,156.30 = 140,284.49 : x
  2. Step 2: Convert to fraction form
    420,767.15/631,156.30 = 140,284.49/x
  3. Step 3: Cross multiply
    420,767.15x = 631,156.30 × 140,284.49
  4. Step 4: Simplify right side
    420,767.15x = 88,541,435,798.58
  5. Step 5: Solve for x
    x = 88,541,435,798.58/420,767.15
  6. Step 6: Final answer
    x = 210,428.59

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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.