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Finding the Fourth Proportional to 1,295.92, 1,789.08 and 772.08

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Solution

The fourth proportional to 1,295.92, 1,789.08 and 772.08 is: 1,065.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.92 : 1,789.08 = 772.08 : x
  2. Step 2: Convert to fraction form
    1,295.92/1,789.08 = 772.08/x
  3. Step 3: Cross multiply
    1,295.92x = 1,789.08 × 772.08
  4. Step 4: Simplify right side
    1,295.92x = 1,381,312.89
  5. Step 5: Solve for x
    x = 1,381,312.89/1,295.92
  6. Step 6: Final answer
    x = 1,065.89

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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.