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Finding the Fourth Proportional to 1,520.38, 2,098.12 and 857.22

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Solution

The fourth proportional to 1,520.38, 2,098.12 and 857.22 is: 1,182.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.38 : 2,098.12 = 857.22 : x
  2. Step 2: Convert to fraction form
    1,520.38/2,098.12 = 857.22/x
  3. Step 3: Cross multiply
    1,520.38x = 2,098.12 × 857.22
  4. Step 4: Simplify right side
    1,520.38x = 1,798,550.43
  5. Step 5: Solve for x
    x = 1,798,550.43/1,520.38
  6. Step 6: Final answer
    x = 1,182.96

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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.