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Finding the Fourth Proportional to 426.48, 588.78 and 402.72

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Solution

The fourth proportional to 426.48, 588.78 and 402.72 is: 555.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.48 : 588.78 = 402.72 : x
  2. Step 2: Convert to fraction form
    426.48/588.78 = 402.72/x
  3. Step 3: Cross multiply
    426.48x = 588.78 × 402.72
  4. Step 4: Simplify right side
    426.48x = 237,113.48
  5. Step 5: Solve for x
    x = 237,113.48/426.48
  6. Step 6: Final answer
    x = 555.98

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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.