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Finding the Fourth Proportional to 1,125.03, 1,687.43 and 303.39

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Solution

The fourth proportional to 1,125.03, 1,687.43 and 303.39 is: 455.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.03 : 1,687.43 = 303.39 : x
  2. Step 2: Convert to fraction form
    1,125.03/1,687.43 = 303.39/x
  3. Step 3: Cross multiply
    1,125.03x = 1,687.43 × 303.39
  4. Step 4: Simplify right side
    1,125.03x = 511,943.65
  5. Step 5: Solve for x
    x = 511,943.65/1,125.03
  6. Step 6: Final answer
    x = 455.05

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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.