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Finding the Fourth Proportional to 418,637.20, 627,840.60 and 169,344.40

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Solution

The fourth proportional to 418,637.20, 627,840.60 and 169,344.40 is: 253,970.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,637.20 : 627,840.60 = 169,344.40 : x
  2. Step 2: Convert to fraction form
    418,637.20/627,840.60 = 169,344.40/x
  3. Step 3: Cross multiply
    418,637.20x = 627,840.60 × 169,344.40
  4. Step 4: Simplify right side
    418,637.20x = 106,321,289,702.64
  5. Step 5: Solve for x
    x = 106,321,289,702.64/418,637.20
  6. Step 6: Final answer
    x = 253,970.00

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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.