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Finding the Fourth Proportional to 343,930.40, 515,722.80 and 156,730.40

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Solution

The fourth proportional to 343,930.40, 515,722.80 and 156,730.40 is: 235,016.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,930.40 : 515,722.80 = 156,730.40 : x
  2. Step 2: Convert to fraction form
    343,930.40/515,722.80 = 156,730.40/x
  3. Step 3: Cross multiply
    343,930.40x = 515,722.80 × 156,730.40
  4. Step 4: Simplify right side
    343,930.40x = 80,829,440,733.12
  5. Step 5: Solve for x
    x = 80,829,440,733.12/343,930.40
  6. Step 6: Final answer
    x = 235,016.85

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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.