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Finding the Fourth Proportional to 372,915.20, 514,420.80 and 221,983.04

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Solution

The fourth proportional to 372,915.20, 514,420.80 and 221,983.04 is: 306,216.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,915.20 : 514,420.80 = 221,983.04 : x
  2. Step 2: Convert to fraction form
    372,915.20/514,420.80 = 221,983.04/x
  3. Step 3: Cross multiply
    372,915.20x = 514,420.80 × 221,983.04
  4. Step 4: Simplify right side
    372,915.20x = 114,192,693,023.23
  5. Step 5: Solve for x
    x = 114,192,693,023.23/372,915.20
  6. Step 6: Final answer
    x = 306,216.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.