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Finding the Fourth Proportional to 3,494.24, 5,241.36 and 861.74

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Solution

The fourth proportional to 3,494.24, 5,241.36 and 861.74 is: 1,292.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,494.24 : 5,241.36 = 861.74 : x
  2. Step 2: Convert to fraction form
    3,494.24/5,241.36 = 861.74/x
  3. Step 3: Cross multiply
    3,494.24x = 5,241.36 × 861.74
  4. Step 4: Simplify right side
    3,494.24x = 4,516,681.40
  5. Step 5: Solve for x
    x = 4,516,681.40/3,494.24
  6. Step 6: Final answer
    x = 1,292.61

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1.5x scale

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.