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Finding the Fourth Proportional to 1,125.65, 1,687.34 and 468.01

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Solution

The fourth proportional to 1,125.65, 1,687.34 and 468.01 is: 701.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.65 : 1,687.34 = 468.01 : x
  2. Step 2: Convert to fraction form
    1,125.65/1,687.34 = 468.01/x
  3. Step 3: Cross multiply
    1,125.65x = 1,687.34 × 468.01
  4. Step 4: Simplify right side
    1,125.65x = 789,695.27
  5. Step 5: Solve for x
    x = 789,695.27/1,125.65
  6. Step 6: Final answer
    x = 701.54

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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.