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Finding the Fourth Proportional to 1,970.26, 2,951.13 and 928.70

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Solution

The fourth proportional to 1,970.26, 2,951.13 and 928.70 is: 1,391.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.26 : 2,951.13 = 928.70 : x
  2. Step 2: Convert to fraction form
    1,970.26/2,951.13 = 928.70/x
  3. Step 3: Cross multiply
    1,970.26x = 2,951.13 × 928.70
  4. Step 4: Simplify right side
    1,970.26x = 2,740,714.43
  5. Step 5: Solve for x
    x = 2,740,714.43/1,970.26
  6. Step 6: Final answer
    x = 1,391.04

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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.