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Finding the Fourth Proportional to 256,499.28, 384,749.04 and 69,510.78

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Solution

The fourth proportional to 256,499.28, 384,749.04 and 69,510.78 is: 104,266.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,499.28 : 384,749.04 = 69,510.78 : x
  2. Step 2: Convert to fraction form
    256,499.28/384,749.04 = 69,510.78/x
  3. Step 3: Cross multiply
    256,499.28x = 384,749.04 × 69,510.78
  4. Step 4: Simplify right side
    256,499.28x = 26,744,205,874.65
  5. Step 5: Solve for x
    x = 26,744,205,874.65/256,499.28
  6. Step 6: Final answer
    x = 104,266.20

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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.