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Finding the Fourth Proportional to 1,295.40, 1,951.75 and 1,172.16

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Solution

The fourth proportional to 1,295.40, 1,951.75 and 1,172.16 is: 1,766.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.40 : 1,951.75 = 1,172.16 : x
  2. Step 2: Convert to fraction form
    1,295.40/1,951.75 = 1,172.16/x
  3. Step 3: Cross multiply
    1,295.40x = 1,951.75 × 1,172.16
  4. Step 4: Simplify right side
    1,295.40x = 2,287,753.52
  5. Step 5: Solve for x
    x = 2,287,753.52/1,295.40
  6. Step 6: Final answer
    x = 1,766.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.