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Finding the Fourth Proportional to 1,125.19, 1,687.81 and 303.46

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Solution

The fourth proportional to 1,125.19, 1,687.81 and 303.46 is: 455.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.19 : 1,687.81 = 303.46 : x
  2. Step 2: Convert to fraction form
    1,125.19/1,687.81 = 303.46/x
  3. Step 3: Cross multiply
    1,125.19x = 1,687.81 × 303.46
  4. Step 4: Simplify right side
    1,125.19x = 512,182.82
  5. Step 5: Solve for x
    x = 512,182.82/1,125.19
  6. Step 6: Final answer
    x = 455.20

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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.