Home / 1,398.04-2,081.84-1,382.70

Finding the Fourth Proportional to 1,398.04, 2,081.84 and 1,382.70

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Solution

The fourth proportional to 1,398.04, 2,081.84 and 1,382.70 is: 2,059.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.04 : 2,081.84 = 1,382.70 : x
  2. Step 2: Convert to fraction form
    1,398.04/2,081.84 = 1,382.70/x
  3. Step 3: Cross multiply
    1,398.04x = 2,081.84 × 1,382.70
  4. Step 4: Simplify right side
    1,398.04x = 2,878,560.17
  5. Step 5: Solve for x
    x = 2,878,560.17/1,398.04
  6. Step 6: Final answer
    x = 2,059.00

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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.