Home / 1,538.60-2,122.56-908.96

Finding the Fourth Proportional to 1,538.60, 2,122.56 and 908.96

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Solution

The fourth proportional to 1,538.60, 2,122.56 and 908.96 is: 1,253.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.60 : 2,122.56 = 908.96 : x
  2. Step 2: Convert to fraction form
    1,538.60/2,122.56 = 908.96/x
  3. Step 3: Cross multiply
    1,538.60x = 2,122.56 × 908.96
  4. Step 4: Simplify right side
    1,538.60x = 1,929,322.14
  5. Step 5: Solve for x
    x = 1,929,322.14/1,538.60
  6. Step 6: Final answer
    x = 1,253.95

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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.