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Finding the Fourth Proportional to 281.47, 423.77 and 247.45

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Solution

The fourth proportional to 281.47, 423.77 and 247.45 is: 372.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.47 : 423.77 = 247.45 : x
  2. Step 2: Convert to fraction form
    281.47/423.77 = 247.45/x
  3. Step 3: Cross multiply
    281.47x = 423.77 × 247.45
  4. Step 4: Simplify right side
    281.47x = 104,861.89
  5. Step 5: Solve for x
    x = 104,861.89/281.47
  6. Step 6: Final answer
    x = 372.55

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.