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Finding the Fourth Proportional to 264,985.20, 397,372.20 and 87,442.80

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Solution

The fourth proportional to 264,985.20, 397,372.20 and 87,442.80 is: 131,129.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,985.20 : 397,372.20 = 87,442.80 : x
  2. Step 2: Convert to fraction form
    264,985.20/397,372.20 = 87,442.80/x
  3. Step 3: Cross multiply
    264,985.20x = 397,372.20 × 87,442.80
  4. Step 4: Simplify right side
    264,985.20x = 34,747,337,810.16
  5. Step 5: Solve for x
    x = 34,747,337,810.16/264,985.20
  6. Step 6: Final answer
    x = 131,129.35

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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.