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Finding the Fourth Proportional to 1,177.44, 1,764.45 and 649.23

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Solution

The fourth proportional to 1,177.44, 1,764.45 and 649.23 is: 972.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.44 : 1,764.45 = 649.23 : x
  2. Step 2: Convert to fraction form
    1,177.44/1,764.45 = 649.23/x
  3. Step 3: Cross multiply
    1,177.44x = 1,764.45 × 649.23
  4. Step 4: Simplify right side
    1,177.44x = 1,145,533.87
  5. Step 5: Solve for x
    x = 1,145,533.87/1,177.44
  6. Step 6: Final answer
    x = 972.90

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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.