Home / 509,318.83-763,503.40-172,123.71

Finding the Fourth Proportional to 509,318.83, 763,503.40 and 172,123.71

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Solution

The fourth proportional to 509,318.83, 763,503.40 and 172,123.71 is: 258,025.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,318.83 : 763,503.40 = 172,123.71 : x
  2. Step 2: Convert to fraction form
    509,318.83/763,503.40 = 172,123.71/x
  3. Step 3: Cross multiply
    509,318.83x = 763,503.40 × 172,123.71
  4. Step 4: Simplify right side
    509,318.83x = 131,417,037,805.61
  5. Step 5: Solve for x
    x = 131,417,037,805.61/509,318.83
  6. Step 6: Final answer
    x = 258,025.09

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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.