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Finding the Fourth Proportional to 352,047.20, 528,070.80 and 331,311.20

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Solution

The fourth proportional to 352,047.20, 528,070.80 and 331,311.20 is: 496,966.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,047.20 : 528,070.80 = 331,311.20 : x
  2. Step 2: Convert to fraction form
    352,047.20/528,070.80 = 331,311.20/x
  3. Step 3: Cross multiply
    352,047.20x = 528,070.80 × 331,311.20
  4. Step 4: Simplify right side
    352,047.20x = 174,955,770,432.96
  5. Step 5: Solve for x
    x = 174,955,770,432.96/352,047.20
  6. Step 6: Final answer
    x = 496,966.80

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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.