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Finding the Fourth Proportional to 486.36, 724.12 and 483.92

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Solution

The fourth proportional to 486.36, 724.12 and 483.92 is: 720.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.36 : 724.12 = 483.92 : x
  2. Step 2: Convert to fraction form
    486.36/724.12 = 483.92/x
  3. Step 3: Cross multiply
    486.36x = 724.12 × 483.92
  4. Step 4: Simplify right side
    486.36x = 350,416.15
  5. Step 5: Solve for x
    x = 350,416.15/486.36
  6. Step 6: Final answer
    x = 720.49

Related Problems

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Double scale
Find fourth proportional to 487.36, 725.61 and 484.92
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.