Home / 3,750.80-5,627.40-1,287.20

Finding the Fourth Proportional to 3,750.80, 5,627.40 and 1,287.20

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Solution

The fourth proportional to 3,750.80, 5,627.40 and 1,287.20 is: 1,931.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,750.80 : 5,627.40 = 1,287.20 : x
  2. Step 2: Convert to fraction form
    3,750.80/5,627.40 = 1,287.20/x
  3. Step 3: Cross multiply
    3,750.80x = 5,627.40 × 1,287.20
  4. Step 4: Simplify right side
    3,750.80x = 7,243,589.28
  5. Step 5: Solve for x
    x = 7,243,589.28/3,750.80
  6. Step 6: Final answer
    x = 1,931.21

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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.