Home / 2,280.78-3,147.51-1,397.07

Finding the Fourth Proportional to 2,280.78, 3,147.51 and 1,397.07

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Solution

The fourth proportional to 2,280.78, 3,147.51 and 1,397.07 is: 1,927.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.78 : 3,147.51 = 1,397.07 : x
  2. Step 2: Convert to fraction form
    2,280.78/3,147.51 = 1,397.07/x
  3. Step 3: Cross multiply
    2,280.78x = 3,147.51 × 1,397.07
  4. Step 4: Simplify right side
    2,280.78x = 4,397,291.80
  5. Step 5: Solve for x
    x = 4,397,291.80/2,280.78
  6. Step 6: Final answer
    x = 1,927.98

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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.