Home / 2,913.68-4,020.54-1,778.78

Finding the Fourth Proportional to 2,913.68, 4,020.54 and 1,778.78

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Solution

The fourth proportional to 2,913.68, 4,020.54 and 1,778.78 is: 2,454.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.68 : 4,020.54 = 1,778.78 : x
  2. Step 2: Convert to fraction form
    2,913.68/4,020.54 = 1,778.78/x
  3. Step 3: Cross multiply
    2,913.68x = 4,020.54 × 1,778.78
  4. Step 4: Simplify right side
    2,913.68x = 7,151,656.14
  5. Step 5: Solve for x
    x = 7,151,656.14/2,913.68
  6. Step 6: Final answer
    x = 2,454.51

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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.