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Finding the Fourth Proportional to 402.40, 601.13 and 353.80

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Solution

The fourth proportional to 402.40, 601.13 and 353.80 is: 528.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.40 : 601.13 = 353.80 : x
  2. Step 2: Convert to fraction form
    402.40/601.13 = 353.80/x
  3. Step 3: Cross multiply
    402.40x = 601.13 × 353.80
  4. Step 4: Simplify right side
    402.40x = 212,679.79
  5. Step 5: Solve for x
    x = 212,679.79/402.40
  6. Step 6: Final answer
    x = 528.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.