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Finding the Fourth Proportional to 666.25, 999.27 and 319.03

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Solution

The fourth proportional to 666.25, 999.27 and 319.03 is: 478.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.25 : 999.27 = 319.03 : x
  2. Step 2: Convert to fraction form
    666.25/999.27 = 319.03/x
  3. Step 3: Cross multiply
    666.25x = 999.27 × 319.03
  4. Step 4: Simplify right side
    666.25x = 318,794.61
  5. Step 5: Solve for x
    x = 318,794.61/666.25
  6. Step 6: Final answer
    x = 478.49

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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.