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Finding the Fourth Proportional to 473.40, 713.70 and 426.42

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Solution

The fourth proportional to 473.40, 713.70 and 426.42 is: 642.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.40 : 713.70 = 426.42 : x
  2. Step 2: Convert to fraction form
    473.40/713.70 = 426.42/x
  3. Step 3: Cross multiply
    473.40x = 713.70 × 426.42
  4. Step 4: Simplify right side
    473.40x = 304,335.95
  5. Step 5: Solve for x
    x = 304,335.95/473.40
  6. Step 6: Final answer
    x = 642.87

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.