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Finding the Fourth Proportional to 402.06, 602.17 and 255.81

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Solution

The fourth proportional to 402.06, 602.17 and 255.81 is: 383.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.06 : 602.17 = 255.81 : x
  2. Step 2: Convert to fraction form
    402.06/602.17 = 255.81/x
  3. Step 3: Cross multiply
    402.06x = 602.17 × 255.81
  4. Step 4: Simplify right side
    402.06x = 154,038.10
  5. Step 5: Solve for x
    x = 154,038.10/402.06
  6. Step 6: Final answer
    x = 383.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.