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Finding the Fourth Proportional to 543.40, 747.30 and 437.20

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Solution

The fourth proportional to 543.40, 747.30 and 437.20 is: 601.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.40 : 747.30 = 437.20 : x
  2. Step 2: Convert to fraction form
    543.40/747.30 = 437.20/x
  3. Step 3: Cross multiply
    543.40x = 747.30 × 437.20
  4. Step 4: Simplify right side
    543.40x = 326,719.56
  5. Step 5: Solve for x
    x = 326,719.56/543.40
  6. Step 6: Final answer
    x = 601.25

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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.