Home / 1,502.20-2,070.10-1,081.81

Finding the Fourth Proportional to 1,502.20, 2,070.10 and 1,081.81

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Solution

The fourth proportional to 1,502.20, 2,070.10 and 1,081.81 is: 1,490.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,502.20 : 2,070.10 = 1,081.81 : x
  2. Step 2: Convert to fraction form
    1,502.20/2,070.10 = 1,081.81/x
  3. Step 3: Cross multiply
    1,502.20x = 2,070.10 × 1,081.81
  4. Step 4: Simplify right side
    1,502.20x = 2,239,454.88
  5. Step 5: Solve for x
    x = 2,239,454.88/1,502.20
  6. Step 6: Final answer
    x = 1,490.78

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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.