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Finding the Fourth Proportional to 691.83, 954.74 and 542.63

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Solution

The fourth proportional to 691.83, 954.74 and 542.63 is: 748.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.83 : 954.74 = 542.63 : x
  2. Step 2: Convert to fraction form
    691.83/954.74 = 542.63/x
  3. Step 3: Cross multiply
    691.83x = 954.74 × 542.63
  4. Step 4: Simplify right side
    691.83x = 518,070.57
  5. Step 5: Solve for x
    x = 518,070.57/691.83
  6. Step 6: Final answer
    x = 748.84

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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.