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Finding the Fourth Proportional to 650.28, 891.38 and 649.20

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Solution

The fourth proportional to 650.28, 891.38 and 649.20 is: 889.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.28 : 891.38 = 649.20 : x
  2. Step 2: Convert to fraction form
    650.28/891.38 = 649.20/x
  3. Step 3: Cross multiply
    650.28x = 891.38 × 649.20
  4. Step 4: Simplify right side
    650.28x = 578,683.90
  5. Step 5: Solve for x
    x = 578,683.90/650.28
  6. Step 6: Final answer
    x = 889.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.