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Finding the Fourth Proportional to 541.63, 747.49 and 308.76

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Solution

The fourth proportional to 541.63, 747.49 and 308.76 is: 426.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.63 : 747.49 = 308.76 : x
  2. Step 2: Convert to fraction form
    541.63/747.49 = 308.76/x
  3. Step 3: Cross multiply
    541.63x = 747.49 × 308.76
  4. Step 4: Simplify right side
    541.63x = 230,789.73
  5. Step 5: Solve for x
    x = 230,789.73/541.63
  6. Step 6: Final answer
    x = 426.10

Related Problems

Find fourth proportional to 270.82, 373.74 and 154.38
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Double scale
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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.