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Finding the Fourth Proportional to 1,151.34, 1,725.57 and 457.26

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Solution

The fourth proportional to 1,151.34, 1,725.57 and 457.26 is: 685.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.34 : 1,725.57 = 457.26 : x
  2. Step 2: Convert to fraction form
    1,151.34/1,725.57 = 457.26/x
  3. Step 3: Cross multiply
    1,151.34x = 1,725.57 × 457.26
  4. Step 4: Simplify right side
    1,151.34x = 789,034.14
  5. Step 5: Solve for x
    x = 789,034.14/1,151.34
  6. Step 6: Final answer
    x = 685.32

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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.