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Finding the Fourth Proportional to 1,525.67, 2,105.28 and 862.39

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Solution

The fourth proportional to 1,525.67, 2,105.28 and 862.39 is: 1,190.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,525.67 : 2,105.28 = 862.39 : x
  2. Step 2: Convert to fraction form
    1,525.67/2,105.28 = 862.39/x
  3. Step 3: Cross multiply
    1,525.67x = 2,105.28 × 862.39
  4. Step 4: Simplify right side
    1,525.67x = 1,815,572.42
  5. Step 5: Solve for x
    x = 1,815,572.42/1,525.67
  6. Step 6: Final answer
    x = 1,190.02

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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.