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Finding the Fourth Proportional to 1,158.45, 1,737.31 and 388.77

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Solution

The fourth proportional to 1,158.45, 1,737.31 and 388.77 is: 583.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.45 : 1,737.31 = 388.77 : x
  2. Step 2: Convert to fraction form
    1,158.45/1,737.31 = 388.77/x
  3. Step 3: Cross multiply
    1,158.45x = 1,737.31 × 388.77
  4. Step 4: Simplify right side
    1,158.45x = 675,414.01
  5. Step 5: Solve for x
    x = 675,414.01/1,158.45
  6. Step 6: Final answer
    x = 583.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.