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Finding the Fourth Proportional to 418,637.13, 627,909 and 115,054.56

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Solution

The fourth proportional to 418,637.13, 627,909 and 115,054.56 is: 172,569.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,637.13 : 627,909 = 115,054.56 : x
  2. Step 2: Convert to fraction form
    418,637.13/627,909 = 115,054.56/x
  3. Step 3: Cross multiply
    418,637.13x = 627,909 × 115,054.56
  4. Step 4: Simplify right side
    418,637.13x = 72,243,793,715.04
  5. Step 5: Solve for x
    x = 72,243,793,715.04/418,637.13
  6. Step 6: Final answer
    x = 172,569.01

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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.