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Finding the Fourth Proportional to 1,512.55, 2,269.77 and 646.87

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Solution

The fourth proportional to 1,512.55, 2,269.77 and 646.87 is: 970.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.55 : 2,269.77 = 646.87 : x
  2. Step 2: Convert to fraction form
    1,512.55/2,269.77 = 646.87/x
  3. Step 3: Cross multiply
    1,512.55x = 2,269.77 × 646.87
  4. Step 4: Simplify right side
    1,512.55x = 1,468,246.12
  5. Step 5: Solve for x
    x = 1,468,246.12/1,512.55
  6. Step 6: Final answer
    x = 970.71

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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.