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Finding the Fourth Proportional to 1,162.13, 1,604.49 and 720.50

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Solution

The fourth proportional to 1,162.13, 1,604.49 and 720.50 is: 994.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.13 : 1,604.49 = 720.50 : x
  2. Step 2: Convert to fraction form
    1,162.13/1,604.49 = 720.50/x
  3. Step 3: Cross multiply
    1,162.13x = 1,604.49 × 720.50
  4. Step 4: Simplify right side
    1,162.13x = 1,156,035.05
  5. Step 5: Solve for x
    x = 1,156,035.05/1,162.13
  6. Step 6: Final answer
    x = 994.76

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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.