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Finding the Fourth Proportional to 521.57, 717.71 and 426.19

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Solution

The fourth proportional to 521.57, 717.71 and 426.19 is: 586.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.57 : 717.71 = 426.19 : x
  2. Step 2: Convert to fraction form
    521.57/717.71 = 426.19/x
  3. Step 3: Cross multiply
    521.57x = 717.71 × 426.19
  4. Step 4: Simplify right side
    521.57x = 305,875.11
  5. Step 5: Solve for x
    x = 305,875.11/521.57
  6. Step 6: Final answer
    x = 586.46

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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.