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Finding the Fourth Proportional to 543.12, 749.48 and 346.69

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Solution

The fourth proportional to 543.12, 749.48 and 346.69 is: 478.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.12 : 749.48 = 346.69 : x
  2. Step 2: Convert to fraction form
    543.12/749.48 = 346.69/x
  3. Step 3: Cross multiply
    543.12x = 749.48 × 346.69
  4. Step 4: Simplify right side
    543.12x = 259,835.49
  5. Step 5: Solve for x
    x = 259,835.49/543.12
  6. Step 6: Final answer
    x = 478.42

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.