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Finding the Fourth Proportional to 343,640.60, 515,337.28 and 118,940

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Solution

The fourth proportional to 343,640.60, 515,337.28 and 118,940 is: 178,367.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,640.60 : 515,337.28 = 118,940 : x
  2. Step 2: Convert to fraction form
    343,640.60/515,337.28 = 118,940/x
  3. Step 3: Cross multiply
    343,640.60x = 515,337.28 × 118,940
  4. Step 4: Simplify right side
    343,640.60x = 61,294,216,083.20
  5. Step 5: Solve for x
    x = 61,294,216,083.20/343,640.60
  6. Step 6: Final answer
    x = 178,367.21

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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.