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Finding the Fourth Proportional to 402.41, 555.11 and 291.70

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Solution

The fourth proportional to 402.41, 555.11 and 291.70 is: 402.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.41 : 555.11 = 291.70 : x
  2. Step 2: Convert to fraction form
    402.41/555.11 = 291.70/x
  3. Step 3: Cross multiply
    402.41x = 555.11 × 291.70
  4. Step 4: Simplify right side
    402.41x = 161,922.81
  5. Step 5: Solve for x
    x = 161,922.81/402.41
  6. Step 6: Final answer
    x = 402.38

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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.