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Finding the Fourth Proportional to 507.60, 761.72 and 325.12

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Solution

The fourth proportional to 507.60, 761.72 and 325.12 is: 487.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.60 : 761.72 = 325.12 : x
  2. Step 2: Convert to fraction form
    507.60/761.72 = 325.12/x
  3. Step 3: Cross multiply
    507.60x = 761.72 × 325.12
  4. Step 4: Simplify right side
    507.60x = 247,650.41
  5. Step 5: Solve for x
    x = 247,650.41/507.60
  6. Step 6: Final answer
    x = 487.88

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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.