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Finding the Fourth Proportional to 1,357.78, 2,034.81 and 707.17

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Solution

The fourth proportional to 1,357.78, 2,034.81 and 707.17 is: 1,059.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.78 : 2,034.81 = 707.17 : x
  2. Step 2: Convert to fraction form
    1,357.78/2,034.81 = 707.17/x
  3. Step 3: Cross multiply
    1,357.78x = 2,034.81 × 707.17
  4. Step 4: Simplify right side
    1,357.78x = 1,438,956.59
  5. Step 5: Solve for x
    x = 1,438,956.59/1,357.78
  6. Step 6: Final answer
    x = 1,059.79

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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.