Home / 1,398.60-2,087.26-1,342.08

Finding the Fourth Proportional to 1,398.60, 2,087.26 and 1,342.08

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Solution

The fourth proportional to 1,398.60, 2,087.26 and 1,342.08 is: 2,002.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.60 : 2,087.26 = 1,342.08 : x
  2. Step 2: Convert to fraction form
    1,398.60/2,087.26 = 1,342.08/x
  3. Step 3: Cross multiply
    1,398.60x = 2,087.26 × 1,342.08
  4. Step 4: Simplify right side
    1,398.60x = 2,801,269.90
  5. Step 5: Solve for x
    x = 2,801,269.90/1,398.60
  6. Step 6: Final answer
    x = 2,002.91

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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.