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Finding the Fourth Proportional to 1,152.21, 1,589.58 and 803.10

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Solution

The fourth proportional to 1,152.21, 1,589.58 and 803.10 is: 1,107.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.21 : 1,589.58 = 803.10 : x
  2. Step 2: Convert to fraction form
    1,152.21/1,589.58 = 803.10/x
  3. Step 3: Cross multiply
    1,152.21x = 1,589.58 × 803.10
  4. Step 4: Simplify right side
    1,152.21x = 1,276,591.70
  5. Step 5: Solve for x
    x = 1,276,591.70/1,152.21
  6. Step 6: Final answer
    x = 1,107.95

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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.