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Finding the Fourth Proportional to 691.92, 955.06 and 426.44

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Solution

The fourth proportional to 691.92, 955.06 and 426.44 is: 588.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.92 : 955.06 = 426.44 : x
  2. Step 2: Convert to fraction form
    691.92/955.06 = 426.44/x
  3. Step 3: Cross multiply
    691.92x = 955.06 × 426.44
  4. Step 4: Simplify right side
    691.92x = 407,275.79
  5. Step 5: Solve for x
    x = 407,275.79/691.92
  6. Step 6: Final answer
    x = 588.62

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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.