Home / 2,860.90-4,287.30-1,127.50

Finding the Fourth Proportional to 2,860.90, 4,287.30 and 1,127.50

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Solution

The fourth proportional to 2,860.90, 4,287.30 and 1,127.50 is: 1,689.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.90 : 4,287.30 = 1,127.50 : x
  2. Step 2: Convert to fraction form
    2,860.90/4,287.30 = 1,127.50/x
  3. Step 3: Cross multiply
    2,860.90x = 4,287.30 × 1,127.50
  4. Step 4: Simplify right side
    2,860.90x = 4,833,930.75
  5. Step 5: Solve for x
    x = 4,833,930.75/2,860.90
  6. Step 6: Final answer
    x = 1,689.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.