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Finding the Fourth Proportional to 3,876.31, 5,345.22 and 3,374.65

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Solution

The fourth proportional to 3,876.31, 5,345.22 and 3,374.65 is: 4,653.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.31 : 5,345.22 = 3,374.65 : x
  2. Step 2: Convert to fraction form
    3,876.31/5,345.22 = 3,374.65/x
  3. Step 3: Cross multiply
    3,876.31x = 5,345.22 × 3,374.65
  4. Step 4: Simplify right side
    3,876.31x = 18,038,246.67
  5. Step 5: Solve for x
    x = 18,038,246.67/3,876.31
  6. Step 6: Final answer
    x = 4,653.46

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1.5x scale

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.