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Finding the Fourth Proportional to 691.20, 954.72 and 443.34

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Solution

The fourth proportional to 691.20, 954.72 and 443.34 is: 612.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.20 : 954.72 = 443.34 : x
  2. Step 2: Convert to fraction form
    691.20/954.72 = 443.34/x
  3. Step 3: Cross multiply
    691.20x = 954.72 × 443.34
  4. Step 4: Simplify right side
    691.20x = 423,265.56
  5. Step 5: Solve for x
    x = 423,265.56/691.20
  6. Step 6: Final answer
    x = 612.36

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Half scale
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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.