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Finding the Fourth Proportional to 1,358.48, 2,036.28 and 707.78

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Solution

The fourth proportional to 1,358.48, 2,036.28 and 707.78 is: 1,060.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.48 : 2,036.28 = 707.78 : x
  2. Step 2: Convert to fraction form
    1,358.48/2,036.28 = 707.78/x
  3. Step 3: Cross multiply
    1,358.48x = 2,036.28 × 707.78
  4. Step 4: Simplify right side
    1,358.48x = 1,441,238.26
  5. Step 5: Solve for x
    x = 1,441,238.26/1,358.48
  6. Step 6: Final answer
    x = 1,060.92

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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.