Home / 1,125.03-1,687.31-303.11

Finding the Fourth Proportional to 1,125.03, 1,687.31 and 303.11

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Solution

The fourth proportional to 1,125.03, 1,687.31 and 303.11 is: 454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.03 : 1,687.31 = 303.11 : x
  2. Step 2: Convert to fraction form
    1,125.03/1,687.31 = 303.11/x
  3. Step 3: Cross multiply
    1,125.03x = 1,687.31 × 303.11
  4. Step 4: Simplify right side
    1,125.03x = 511,440.53
  5. Step 5: Solve for x
    x = 511,440.53/1,125.03
  6. Step 6: Final answer
    x = 454.60

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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.