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Finding the Fourth Proportional to 1,174.86, 1,621.28 and 650.90

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Solution

The fourth proportional to 1,174.86, 1,621.28 and 650.90 is: 898.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.86 : 1,621.28 = 650.90 : x
  2. Step 2: Convert to fraction form
    1,174.86/1,621.28 = 650.90/x
  3. Step 3: Cross multiply
    1,174.86x = 1,621.28 × 650.90
  4. Step 4: Simplify right side
    1,174.86x = 1,055,283.05
  5. Step 5: Solve for x
    x = 1,055,283.05/1,174.86
  6. Step 6: Final answer
    x = 898.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.