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Finding the Fourth Proportional to 343,702.20, 515,346.19 and 154,128.29

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Solution

The fourth proportional to 343,702.20, 515,346.19 and 154,128.29 is: 231,099.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,702.20 : 515,346.19 = 154,128.29 : x
  2. Step 2: Convert to fraction form
    343,702.20/515,346.19 = 154,128.29/x
  3. Step 3: Cross multiply
    343,702.20x = 515,346.19 × 154,128.29
  4. Step 4: Simplify right side
    343,702.20x = 79,429,427,925.76
  5. Step 5: Solve for x
    x = 79,429,427,925.76/343,702.20
  6. Step 6: Final answer
    x = 231,099.56

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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.