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Finding the Fourth Proportional to 1,076.57, 1,613.50 and 459.55

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Solution

The fourth proportional to 1,076.57, 1,613.50 and 459.55 is: 688.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.57 : 1,613.50 = 459.55 : x
  2. Step 2: Convert to fraction form
    1,076.57/1,613.50 = 459.55/x
  3. Step 3: Cross multiply
    1,076.57x = 1,613.50 × 459.55
  4. Step 4: Simplify right side
    1,076.57x = 741,483.93
  5. Step 5: Solve for x
    x = 741,483.93/1,076.57
  6. Step 6: Final answer
    x = 688.75

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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.