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Finding the Fourth Proportional to 718.92, 991.56 and 483.13

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Solution

The fourth proportional to 718.92, 991.56 and 483.13 is: 666.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.92 : 991.56 = 483.13 : x
  2. Step 2: Convert to fraction form
    718.92/991.56 = 483.13/x
  3. Step 3: Cross multiply
    718.92x = 991.56 × 483.13
  4. Step 4: Simplify right side
    718.92x = 479,052.38
  5. Step 5: Solve for x
    x = 479,052.38/718.92
  6. Step 6: Final answer
    x = 666.35

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.