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Finding the Fourth Proportional to 402.74, 555.55 and 292.08

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Solution

The fourth proportional to 402.74, 555.55 and 292.08 is: 402.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.74 : 555.55 = 292.08 : x
  2. Step 2: Convert to fraction form
    402.74/555.55 = 292.08/x
  3. Step 3: Cross multiply
    402.74x = 555.55 × 292.08
  4. Step 4: Simplify right side
    402.74x = 162,264.31
  5. Step 5: Solve for x
    x = 162,264.31/402.74
  6. Step 6: Final answer
    x = 402.91

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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.