Home / 1,012.30-1,518.45-281.93

Finding the Fourth Proportional to 1,012.30, 1,518.45 and 281.93

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Solution

The fourth proportional to 1,012.30, 1,518.45 and 281.93 is: 422.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.30 : 1,518.45 = 281.93 : x
  2. Step 2: Convert to fraction form
    1,012.30/1,518.45 = 281.93/x
  3. Step 3: Cross multiply
    1,012.30x = 1,518.45 × 281.93
  4. Step 4: Simplify right side
    1,012.30x = 428,096.61
  5. Step 5: Solve for x
    x = 428,096.61/1,012.30
  6. Step 6: Final answer
    x = 422.90

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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.