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Finding the Fourth Proportional to 256,246.20, 384,369.28 and 129,866.76

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Solution

The fourth proportional to 256,246.20, 384,369.28 and 129,866.76 is: 194,800.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,246.20 : 384,369.28 = 129,866.76 : x
  2. Step 2: Convert to fraction form
    256,246.20/384,369.28 = 129,866.76/x
  3. Step 3: Cross multiply
    256,246.20x = 384,369.28 × 129,866.76
  4. Step 4: Simplify right side
    256,246.20x = 49,916,793,037.13
  5. Step 5: Solve for x
    x = 49,916,793,037.13/256,246.20
  6. Step 6: Final answer
    x = 194,800.13

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1.5x scale

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.