Home / 1,515.24-2,270.70-1,312.20

Finding the Fourth Proportional to 1,515.24, 2,270.70 and 1,312.20

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Solution

The fourth proportional to 1,515.24, 2,270.70 and 1,312.20 is: 1,966.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.24 : 2,270.70 = 1,312.20 : x
  2. Step 2: Convert to fraction form
    1,515.24/2,270.70 = 1,312.20/x
  3. Step 3: Cross multiply
    1,515.24x = 2,270.70 × 1,312.20
  4. Step 4: Simplify right side
    1,515.24x = 2,979,612.54
  5. Step 5: Solve for x
    x = 2,979,612.54/1,515.24
  6. Step 6: Final answer
    x = 1,966.43

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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.