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Finding the Fourth Proportional to 282.02, 422.91 and 99.35

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Solution

The fourth proportional to 282.02, 422.91 and 99.35 is: 148.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.02 : 422.91 = 99.35 : x
  2. Step 2: Convert to fraction form
    282.02/422.91 = 99.35/x
  3. Step 3: Cross multiply
    282.02x = 422.91 × 99.35
  4. Step 4: Simplify right side
    282.02x = 42,016.11
  5. Step 5: Solve for x
    x = 42,016.11/282.02
  6. Step 6: Final answer
    x = 148.98

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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.