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Finding the Fourth Proportional to 230,486.52, 318,042.54 and 128,487

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Solution

The fourth proportional to 230,486.52, 318,042.54 and 128,487 is: 177,295.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,486.52 : 318,042.54 = 128,487 : x
  2. Step 2: Convert to fraction form
    230,486.52/318,042.54 = 128,487/x
  3. Step 3: Cross multiply
    230,486.52x = 318,042.54 × 128,487
  4. Step 4: Simplify right side
    230,486.52x = 40,864,331,836.98
  5. Step 5: Solve for x
    x = 40,864,331,836.98/230,486.52
  6. Step 6: Final answer
    x = 177,295.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.