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Finding the Fourth Proportional to 2,868.04, 3,957.78 and 1,689.16

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Solution

The fourth proportional to 2,868.04, 3,957.78 and 1,689.16 is: 2,330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.04 : 3,957.78 = 1,689.16 : x
  2. Step 2: Convert to fraction form
    2,868.04/3,957.78 = 1,689.16/x
  3. Step 3: Cross multiply
    2,868.04x = 3,957.78 × 1,689.16
  4. Step 4: Simplify right side
    2,868.04x = 6,685,323.66
  5. Step 5: Solve for x
    x = 6,685,323.66/2,868.04
  6. Step 6: Final answer
    x = 2,330.97

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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.