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Finding the Fourth Proportional to 508,416.40, 762,405.90 and 255,599.20

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Solution

The fourth proportional to 508,416.40, 762,405.90 and 255,599.20 is: 383,288.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,416.40 : 762,405.90 = 255,599.20 : x
  2. Step 2: Convert to fraction form
    508,416.40/762,405.90 = 255,599.20/x
  3. Step 3: Cross multiply
    508,416.40x = 762,405.90 × 255,599.20
  4. Step 4: Simplify right side
    508,416.40x = 194,870,338,115.28
  5. Step 5: Solve for x
    x = 194,870,338,115.28/508,416.40
  6. Step 6: Final answer
    x = 383,288.85

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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.