Home / 1,778.18-2,455.13-1,280.97

Finding the Fourth Proportional to 1,778.18, 2,455.13 and 1,280.97

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Solution

The fourth proportional to 1,778.18, 2,455.13 and 1,280.97 is: 1,768.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.18 : 2,455.13 = 1,280.97 : x
  2. Step 2: Convert to fraction form
    1,778.18/2,455.13 = 1,280.97/x
  3. Step 3: Cross multiply
    1,778.18x = 2,455.13 × 1,280.97
  4. Step 4: Simplify right side
    1,778.18x = 3,144,941.47
  5. Step 5: Solve for x
    x = 3,144,941.47/1,778.18
  6. Step 6: Final answer
    x = 1,768.63

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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.