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Finding the Fourth Proportional to 1,158.78, 1,599.12 and 634.81

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Solution

The fourth proportional to 1,158.78, 1,599.12 and 634.81 is: 876.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.78 : 1,599.12 = 634.81 : x
  2. Step 2: Convert to fraction form
    1,158.78/1,599.12 = 634.81/x
  3. Step 3: Cross multiply
    1,158.78x = 1,599.12 × 634.81
  4. Step 4: Simplify right side
    1,158.78x = 1,015,137.37
  5. Step 5: Solve for x
    x = 1,015,137.37/1,158.78
  6. Step 6: Final answer
    x = 876.04

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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.