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Finding the Fourth Proportional to 1,174.64, 1,621.17 and 844.16

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Solution

The fourth proportional to 1,174.64, 1,621.17 and 844.16 is: 1,165.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.64 : 1,621.17 = 844.16 : x
  2. Step 2: Convert to fraction form
    1,174.64/1,621.17 = 844.16/x
  3. Step 3: Cross multiply
    1,174.64x = 1,621.17 × 844.16
  4. Step 4: Simplify right side
    1,174.64x = 1,368,518.76
  5. Step 5: Solve for x
    x = 1,368,518.76/1,174.64
  6. Step 6: Final answer
    x = 1,165.06

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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.