Home / 1,576.80-2,178.04-1,279.16

Finding the Fourth Proportional to 1,576.80, 2,178.04 and 1,279.16

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Solution

The fourth proportional to 1,576.80, 2,178.04 and 1,279.16 is: 1,766.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576.80 : 2,178.04 = 1,279.16 : x
  2. Step 2: Convert to fraction form
    1,576.80/2,178.04 = 1,279.16/x
  3. Step 3: Cross multiply
    1,576.80x = 2,178.04 × 1,279.16
  4. Step 4: Simplify right side
    1,576.80x = 2,786,058.12
  5. Step 5: Solve for x
    x = 2,786,058.12/1,576.80
  6. Step 6: Final answer
    x = 1,766.91

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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.