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Finding the Fourth Proportional to 542.69, 748.91 and 346.40

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Solution

The fourth proportional to 542.69, 748.91 and 346.40 is: 478.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.69 : 748.91 = 346.40 : x
  2. Step 2: Convert to fraction form
    542.69/748.91 = 346.40/x
  3. Step 3: Cross multiply
    542.69x = 748.91 × 346.40
  4. Step 4: Simplify right side
    542.69x = 259,422.42
  5. Step 5: Solve for x
    x = 259,422.42/542.69
  6. Step 6: Final answer
    x = 478.03

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.