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Finding the Fourth Proportional to 281.95, 423.05 and 99.48

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Solution

The fourth proportional to 281.95, 423.05 and 99.48 is: 149.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.95 : 423.05 = 99.48 : x
  2. Step 2: Convert to fraction form
    281.95/423.05 = 99.48/x
  3. Step 3: Cross multiply
    281.95x = 423.05 × 99.48
  4. Step 4: Simplify right side
    281.95x = 42,085.01
  5. Step 5: Solve for x
    x = 42,085.01/281.95
  6. Step 6: Final answer
    x = 149.26

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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.