Home / 2,515.31-3,772.97-1,420.60

Finding the Fourth Proportional to 2,515.31, 3,772.97 and 1,420.60

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Solution

The fourth proportional to 2,515.31, 3,772.97 and 1,420.60 is: 2,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,515.31 : 3,772.97 = 1,420.60 : x
  2. Step 2: Convert to fraction form
    2,515.31/3,772.97 = 1,420.60/x
  3. Step 3: Cross multiply
    2,515.31x = 3,772.97 × 1,420.60
  4. Step 4: Simplify right side
    2,515.31x = 5,359,881.18
  5. Step 5: Solve for x
    x = 5,359,881.18/2,515.31
  6. Step 6: Final answer
    x = 2,130.90

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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.