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Finding the Fourth Proportional to 2,670.78, 4,005.32 and 1,854.30

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Solution

The fourth proportional to 2,670.78, 4,005.32 and 1,854.30 is: 2,780.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,670.78 : 4,005.32 = 1,854.30 : x
  2. Step 2: Convert to fraction form
    2,670.78/4,005.32 = 1,854.30/x
  3. Step 3: Cross multiply
    2,670.78x = 4,005.32 × 1,854.30
  4. Step 4: Simplify right side
    2,670.78x = 7,427,055.60
  5. Step 5: Solve for x
    x = 7,427,055.60/2,670.78
  6. Step 6: Final answer
    x = 2,780.86

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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.