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Finding the Fourth Proportional to 1,538.44, 2,122.86 and 875.16

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Solution

The fourth proportional to 1,538.44, 2,122.86 and 875.16 is: 1,207.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.44 : 2,122.86 = 875.16 : x
  2. Step 2: Convert to fraction form
    1,538.44/2,122.86 = 875.16/x
  3. Step 3: Cross multiply
    1,538.44x = 2,122.86 × 875.16
  4. Step 4: Simplify right side
    1,538.44x = 1,857,842.16
  5. Step 5: Solve for x
    x = 1,857,842.16/1,538.44
  6. Step 6: Final answer
    x = 1,207.61

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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.