Home / 2,143.40-2,957.16-1,357.28

Finding the Fourth Proportional to 2,143.40, 2,957.16 and 1,357.28

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Solution

The fourth proportional to 2,143.40, 2,957.16 and 1,357.28 is: 1,872.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.40 : 2,957.16 = 1,357.28 : x
  2. Step 2: Convert to fraction form
    2,143.40/2,957.16 = 1,357.28/x
  3. Step 3: Cross multiply
    2,143.40x = 2,957.16 × 1,357.28
  4. Step 4: Simplify right side
    2,143.40x = 4,013,694.12
  5. Step 5: Solve for x
    x = 4,013,694.12/2,143.40
  6. Step 6: Final answer
    x = 1,872.58

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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.