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Finding the Fourth Proportional to 499.15, 749.08 and 456.12

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Solution

The fourth proportional to 499.15, 749.08 and 456.12 is: 684.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.15 : 749.08 = 456.12 : x
  2. Step 2: Convert to fraction form
    499.15/749.08 = 456.12/x
  3. Step 3: Cross multiply
    499.15x = 749.08 × 456.12
  4. Step 4: Simplify right side
    499.15x = 341,670.37
  5. Step 5: Solve for x
    x = 341,670.37/499.15
  6. Step 6: Final answer
    x = 684.50

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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.