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Finding the Fourth Proportional to 2,779.80, 3,854.25 and 2,648.28

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Solution

The fourth proportional to 2,779.80, 3,854.25 and 2,648.28 is: 3,671.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.80 : 3,854.25 = 2,648.28 : x
  2. Step 2: Convert to fraction form
    2,779.80/3,854.25 = 2,648.28/x
  3. Step 3: Cross multiply
    2,779.80x = 3,854.25 × 2,648.28
  4. Step 4: Simplify right side
    2,779.80x = 10,207,133.19
  5. Step 5: Solve for x
    x = 10,207,133.19/2,779.80
  6. Step 6: Final answer
    x = 3,671.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.