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Finding the Fourth Proportional to 1,162.11, 1,603.17 and 719.85

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Solution

The fourth proportional to 1,162.11, 1,603.17 and 719.85 is: 993.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.11 : 1,603.17 = 719.85 : x
  2. Step 2: Convert to fraction form
    1,162.11/1,603.17 = 719.85/x
  3. Step 3: Cross multiply
    1,162.11x = 1,603.17 × 719.85
  4. Step 4: Simplify right side
    1,162.11x = 1,154,041.92
  5. Step 5: Solve for x
    x = 1,154,041.92/1,162.11
  6. Step 6: Final answer
    x = 993.06

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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.