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Finding the Fourth Proportional to 1,959.39, 2,700.95 and 1,398.87

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Solution

The fourth proportional to 1,959.39, 2,700.95 and 1,398.87 is: 1,928.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.39 : 2,700.95 = 1,398.87 : x
  2. Step 2: Convert to fraction form
    1,959.39/2,700.95 = 1,398.87/x
  3. Step 3: Cross multiply
    1,959.39x = 2,700.95 × 1,398.87
  4. Step 4: Simplify right side
    1,959.39x = 3,778,270.93
  5. Step 5: Solve for x
    x = 3,778,270.93/1,959.39
  6. Step 6: Final answer
    x = 1,928.29

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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.