Home / 2,230.31-3,078.05-1,298.75

Finding the Fourth Proportional to 2,230.31, 3,078.05 and 1,298.75

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Solution

The fourth proportional to 2,230.31, 3,078.05 and 1,298.75 is: 1,792.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.31 : 3,078.05 = 1,298.75 : x
  2. Step 2: Convert to fraction form
    2,230.31/3,078.05 = 1,298.75/x
  3. Step 3: Cross multiply
    2,230.31x = 3,078.05 × 1,298.75
  4. Step 4: Simplify right side
    2,230.31x = 3,997,617.44
  5. Step 5: Solve for x
    x = 3,997,617.44/2,230.31
  6. Step 6: Final answer
    x = 1,792.40

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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.