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Finding the Fourth Proportional to 418,517.30, 627,681.42 and 118,991.36

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Solution

The fourth proportional to 418,517.30, 627,681.42 and 118,991.36 is: 178,460.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,517.30 : 627,681.42 = 118,991.36 : x
  2. Step 2: Convert to fraction form
    418,517.30/627,681.42 = 118,991.36/x
  3. Step 3: Cross multiply
    418,517.30x = 627,681.42 × 118,991.36
  4. Step 4: Simplify right side
    418,517.30x = 74,688,665,812.53
  5. Step 5: Solve for x
    x = 74,688,665,812.53/418,517.30
  6. Step 6: Final answer
    x = 178,460.16

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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.