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Finding the Fourth Proportional to 524.25, 723.20 and 391.68

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Solution

The fourth proportional to 524.25, 723.20 and 391.68 is: 540.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.25 : 723.20 = 391.68 : x
  2. Step 2: Convert to fraction form
    524.25/723.20 = 391.68/x
  3. Step 3: Cross multiply
    524.25x = 723.20 × 391.68
  4. Step 4: Simplify right side
    524.25x = 283,261.02
  5. Step 5: Solve for x
    x = 283,261.02/524.25
  6. Step 6: Final answer
    x = 540.32

Related Problems

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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.