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Finding the Fourth Proportional to 1,168.13, 1,612.02 and 644.18

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Solution

The fourth proportional to 1,168.13, 1,612.02 and 644.18 is: 888.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.13 : 1,612.02 = 644.18 : x
  2. Step 2: Convert to fraction form
    1,168.13/1,612.02 = 644.18/x
  3. Step 3: Cross multiply
    1,168.13x = 1,612.02 × 644.18
  4. Step 4: Simplify right side
    1,168.13x = 1,038,422.98
  5. Step 5: Solve for x
    x = 1,038,422.98/1,168.13
  6. Step 6: Final answer
    x = 888.97

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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.