Home / 1,551.46-2,138.52-1,271.20

Finding the Fourth Proportional to 1,551.46, 2,138.52 and 1,271.20

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Solution

The fourth proportional to 1,551.46, 2,138.52 and 1,271.20 is: 1,752.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.46 : 2,138.52 = 1,271.20 : x
  2. Step 2: Convert to fraction form
    1,551.46/2,138.52 = 1,271.20/x
  3. Step 3: Cross multiply
    1,551.46x = 2,138.52 × 1,271.20
  4. Step 4: Simplify right side
    1,551.46x = 2,718,480.27
  5. Step 5: Solve for x
    x = 2,718,480.27/1,551.46
  6. Step 6: Final answer
    x = 1,752.21

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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.