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Finding the Fourth Proportional to 508,385.40, 762,359.40 and 255,568.20

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Solution

The fourth proportional to 508,385.40, 762,359.40 and 255,568.20 is: 383,242.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,385.40 : 762,359.40 = 255,568.20 : x
  2. Step 2: Convert to fraction form
    508,385.40/762,359.40 = 255,568.20/x
  3. Step 3: Cross multiply
    508,385.40x = 762,359.40 × 255,568.20
  4. Step 4: Simplify right side
    508,385.40x = 194,834,819,611.08
  5. Step 5: Solve for x
    x = 194,834,819,611.08/508,385.40
  6. Step 6: Final answer
    x = 383,242.36

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Double scale
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Similar ratio
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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.