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Finding the Fourth Proportional to 418,318.65, 627,477.98 and 137,799.45

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Solution

The fourth proportional to 418,318.65, 627,477.98 and 137,799.45 is: 206,699.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,318.65 : 627,477.98 = 137,799.45 : x
  2. Step 2: Convert to fraction form
    418,318.65/627,477.98 = 137,799.45/x
  3. Step 3: Cross multiply
    418,318.65x = 627,477.98 × 137,799.45
  4. Step 4: Simplify right side
    418,318.65x = 86,466,119,842.11
  5. Step 5: Solve for x
    x = 86,466,119,842.11/418,318.65
  6. Step 6: Final answer
    x = 206,699.18

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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.