Home / 1,520.38-2,097.96-890.88

Finding the Fourth Proportional to 1,520.38, 2,097.96 and 890.88

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Solution

The fourth proportional to 1,520.38, 2,097.96 and 890.88 is: 1,229.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.38 : 2,097.96 = 890.88 : x
  2. Step 2: Convert to fraction form
    1,520.38/2,097.96 = 890.88/x
  3. Step 3: Cross multiply
    1,520.38x = 2,097.96 × 890.88
  4. Step 4: Simplify right side
    1,520.38x = 1,869,030.60
  5. Step 5: Solve for x
    x = 1,869,030.60/1,520.38
  6. Step 6: Final answer
    x = 1,229.32

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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.