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Finding the Fourth Proportional to 352,672.40, 529,057.20 and 127,978.40

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Solution

The fourth proportional to 352,672.40, 529,057.20 and 127,978.40 is: 191,985.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,672.40 : 529,057.20 = 127,978.40 : x
  2. Step 2: Convert to fraction form
    352,672.40/529,057.20 = 127,978.40/x
  3. Step 3: Cross multiply
    352,672.40x = 529,057.20 × 127,978.40
  4. Step 4: Simplify right side
    352,672.40x = 67,707,893,964.48
  5. Step 5: Solve for x
    x = 67,707,893,964.48/352,672.40
  6. Step 6: Final answer
    x = 191,985.24

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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.