Home / 3,290.40-4,543.94-2,815.51

Finding the Fourth Proportional to 3,290.40, 4,543.94 and 2,815.51

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Solution

The fourth proportional to 3,290.40, 4,543.94 and 2,815.51 is: 3,888.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,290.40 : 4,543.94 = 2,815.51 : x
  2. Step 2: Convert to fraction form
    3,290.40/4,543.94 = 2,815.51/x
  3. Step 3: Cross multiply
    3,290.40x = 4,543.94 × 2,815.51
  4. Step 4: Simplify right side
    3,290.40x = 12,793,508.51
  5. Step 5: Solve for x
    x = 12,793,508.51/3,290.40
  6. Step 6: Final answer
    x = 3,888.13

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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.