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Finding the Fourth Proportional to 1,951.76, 2,927.80 and 653.24

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Solution

The fourth proportional to 1,951.76, 2,927.80 and 653.24 is: 979.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.76 : 2,927.80 = 653.24 : x
  2. Step 2: Convert to fraction form
    1,951.76/2,927.80 = 653.24/x
  3. Step 3: Cross multiply
    1,951.76x = 2,927.80 × 653.24
  4. Step 4: Simplify right side
    1,951.76x = 1,912,556.07
  5. Step 5: Solve for x
    x = 1,912,556.07/1,951.76
  6. Step 6: Final answer
    x = 979.91

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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.