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Finding the Fourth Proportional to 407.88, 562.02 and 276.66

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Solution

The fourth proportional to 407.88, 562.02 and 276.66 is: 381.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.88 : 562.02 = 276.66 : x
  2. Step 2: Convert to fraction form
    407.88/562.02 = 276.66/x
  3. Step 3: Cross multiply
    407.88x = 562.02 × 276.66
  4. Step 4: Simplify right side
    407.88x = 155,488.45
  5. Step 5: Solve for x
    x = 155,488.45/407.88
  6. Step 6: Final answer
    x = 381.21

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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.