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Finding the Fourth Proportional to 487.99, 731.90 and 163.35

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Solution

The fourth proportional to 487.99, 731.90 and 163.35 is: 245.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.99 : 731.90 = 163.35 : x
  2. Step 2: Convert to fraction form
    487.99/731.90 = 163.35/x
  3. Step 3: Cross multiply
    487.99x = 731.90 × 163.35
  4. Step 4: Simplify right side
    487.99x = 119,555.87
  5. Step 5: Solve for x
    x = 119,555.87/487.99
  6. Step 6: Final answer
    x = 245.00

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Double scale
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Similar ratio
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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.