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Finding the Fourth Proportional to 1,265.59, 1,747.31 and 970.29

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Solution

The fourth proportional to 1,265.59, 1,747.31 and 970.29 is: 1,339.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.59 : 1,747.31 = 970.29 : x
  2. Step 2: Convert to fraction form
    1,265.59/1,747.31 = 970.29/x
  3. Step 3: Cross multiply
    1,265.59x = 1,747.31 × 970.29
  4. Step 4: Simplify right side
    1,265.59x = 1,695,392.57
  5. Step 5: Solve for x
    x = 1,695,392.57/1,265.59
  6. Step 6: Final answer
    x = 1,339.61

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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.