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Finding the Fourth Proportional to 1,151.64, 1,589.49 and 802.13

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Solution

The fourth proportional to 1,151.64, 1,589.49 and 802.13 is: 1,107.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.64 : 1,589.49 = 802.13 : x
  2. Step 2: Convert to fraction form
    1,151.64/1,589.49 = 802.13/x
  3. Step 3: Cross multiply
    1,151.64x = 1,589.49 × 802.13
  4. Step 4: Simplify right side
    1,151.64x = 1,274,969.67
  5. Step 5: Solve for x
    x = 1,274,969.67/1,151.64
  6. Step 6: Final answer
    x = 1,107.09

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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.