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Finding the Fourth Proportional to 2,387.78, 3,295.12 and 1,339.85

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Solution

The fourth proportional to 2,387.78, 3,295.12 and 1,339.85 is: 1,848.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.78 : 3,295.12 = 1,339.85 : x
  2. Step 2: Convert to fraction form
    2,387.78/3,295.12 = 1,339.85/x
  3. Step 3: Cross multiply
    2,387.78x = 3,295.12 × 1,339.85
  4. Step 4: Simplify right side
    2,387.78x = 4,414,966.53
  5. Step 5: Solve for x
    x = 4,414,966.53/2,387.78
  6. Step 6: Final answer
    x = 1,848.98

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.