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Finding the Fourth Proportional to 418,359.05, 627,580.10 and 133,978.17

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Solution

The fourth proportional to 418,359.05, 627,580.10 and 133,978.17 is: 200,980.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,359.05 : 627,580.10 = 133,978.17 : x
  2. Step 2: Convert to fraction form
    418,359.05/627,580.10 = 133,978.17/x
  3. Step 3: Cross multiply
    418,359.05x = 627,580.10 × 133,978.17
  4. Step 4: Simplify right side
    418,359.05x = 84,082,032,656.53
  5. Step 5: Solve for x
    x = 84,082,032,656.53/418,359.05
  6. Step 6: Final answer
    x = 200,980.55

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1.5x scale

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.