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Finding the Fourth Proportional to 627,915.20, 941,872.80 and 207,168.80

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Solution

The fourth proportional to 627,915.20, 941,872.80 and 207,168.80 is: 310,753.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,915.20 : 941,872.80 = 207,168.80 : x
  2. Step 2: Convert to fraction form
    627,915.20/941,872.80 = 207,168.80/x
  3. Step 3: Cross multiply
    627,915.20x = 941,872.80 × 207,168.80
  4. Step 4: Simplify right side
    627,915.20x = 195,126,657,728.64
  5. Step 5: Solve for x
    x = 195,126,657,728.64/627,915.20
  6. Step 6: Final answer
    x = 310,753.20

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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.