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Finding the Fourth Proportional to 712.92, 983.16 and 491.52

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Solution

The fourth proportional to 712.92, 983.16 and 491.52 is: 677.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.92 : 983.16 = 491.52 : x
  2. Step 2: Convert to fraction form
    712.92/983.16 = 491.52/x
  3. Step 3: Cross multiply
    712.92x = 983.16 × 491.52
  4. Step 4: Simplify right side
    712.92x = 483,242.80
  5. Step 5: Solve for x
    x = 483,242.80/712.92
  6. Step 6: Final answer
    x = 677.84

Related Problems

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.