Home / 1,576.90-2,176.08-868.78

Finding the Fourth Proportional to 1,576.90, 2,176.08 and 868.78

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Solution

The fourth proportional to 1,576.90, 2,176.08 and 868.78 is: 1,198.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576.90 : 2,176.08 = 868.78 : x
  2. Step 2: Convert to fraction form
    1,576.90/2,176.08 = 868.78/x
  3. Step 3: Cross multiply
    1,576.90x = 2,176.08 × 868.78
  4. Step 4: Simplify right side
    1,576.90x = 1,890,534.78
  5. Step 5: Solve for x
    x = 1,890,534.78/1,576.90
  6. Step 6: Final answer
    x = 1,198.89

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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.