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Finding the Fourth Proportional to 1,158.95, 1,738.47 and 378.94

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Solution

The fourth proportional to 1,158.95, 1,738.47 and 378.94 is: 568.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.95 : 1,738.47 = 378.94 : x
  2. Step 2: Convert to fraction form
    1,158.95/1,738.47 = 378.94/x
  3. Step 3: Cross multiply
    1,158.95x = 1,738.47 × 378.94
  4. Step 4: Simplify right side
    1,158.95x = 658,779.22
  5. Step 5: Solve for x
    x = 658,779.22/1,158.95
  6. Step 6: Final answer
    x = 568.43

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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.