Home / 1,524.20-2,103.40-861.06

Finding the Fourth Proportional to 1,524.20, 2,103.40 and 861.06

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Solution

The fourth proportional to 1,524.20, 2,103.40 and 861.06 is: 1,188.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,524.20 : 2,103.40 = 861.06 : x
  2. Step 2: Convert to fraction form
    1,524.20/2,103.40 = 861.06/x
  3. Step 3: Cross multiply
    1,524.20x = 2,103.40 × 861.06
  4. Step 4: Simplify right side
    1,524.20x = 1,811,153.60
  5. Step 5: Solve for x
    x = 1,811,153.60/1,524.20
  6. Step 6: Final answer
    x = 1,188.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.