Home / 1,398.09-2,081.13-1,377.30

Finding the Fourth Proportional to 1,398.09, 2,081.13 and 1,377.30

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Solution

The fourth proportional to 1,398.09, 2,081.13 and 1,377.30 is: 2,050.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.09 : 2,081.13 = 1,377.30 : x
  2. Step 2: Convert to fraction form
    1,398.09/2,081.13 = 1,377.30/x
  3. Step 3: Cross multiply
    1,398.09x = 2,081.13 × 1,377.30
  4. Step 4: Simplify right side
    1,398.09x = 2,866,340.35
  5. Step 5: Solve for x
    x = 2,866,340.35/1,398.09
  6. Step 6: Final answer
    x = 2,050.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.