Home / 1,397.78-2,097.70-1,127.14

Finding the Fourth Proportional to 1,397.78, 2,097.70 and 1,127.14

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Solution

The fourth proportional to 1,397.78, 2,097.70 and 1,127.14 is: 1,691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.78 : 2,097.70 = 1,127.14 : x
  2. Step 2: Convert to fraction form
    1,397.78/2,097.70 = 1,127.14/x
  3. Step 3: Cross multiply
    1,397.78x = 2,097.70 × 1,127.14
  4. Step 4: Simplify right side
    1,397.78x = 2,364,401.58
  5. Step 5: Solve for x
    x = 2,364,401.58/1,397.78
  6. Step 6: Final answer
    x = 1,691.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.