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Finding the Fourth Proportional to 1,162.95, 1,604.87 and 631.82

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Solution

The fourth proportional to 1,162.95, 1,604.87 and 631.82 is: 871.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.95 : 1,604.87 = 631.82 : x
  2. Step 2: Convert to fraction form
    1,162.95/1,604.87 = 631.82/x
  3. Step 3: Cross multiply
    1,162.95x = 1,604.87 × 631.82
  4. Step 4: Simplify right side
    1,162.95x = 1,013,981.79
  5. Step 5: Solve for x
    x = 1,013,981.79/1,162.95
  6. Step 6: Final answer
    x = 871.91

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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.