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Finding the Fourth Proportional to 542.95, 749.21 and 306.88

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Solution

The fourth proportional to 542.95, 749.21 and 306.88 is: 423.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.95 : 749.21 = 306.88 : x
  2. Step 2: Convert to fraction form
    542.95/749.21 = 306.88/x
  3. Step 3: Cross multiply
    542.95x = 749.21 × 306.88
  4. Step 4: Simplify right side
    542.95x = 229,914.16
  5. Step 5: Solve for x
    x = 229,914.16/542.95
  6. Step 6: Final answer
    x = 423.46

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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.