Home / 1,725.85-2,381.48-979.66

Finding the Fourth Proportional to 1,725.85, 2,381.48 and 979.66

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Solution

The fourth proportional to 1,725.85, 2,381.48 and 979.66 is: 1,351.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.85 : 2,381.48 = 979.66 : x
  2. Step 2: Convert to fraction form
    1,725.85/2,381.48 = 979.66/x
  3. Step 3: Cross multiply
    1,725.85x = 2,381.48 × 979.66
  4. Step 4: Simplify right side
    1,725.85x = 2,333,035.80
  5. Step 5: Solve for x
    x = 2,333,035.80/1,725.85
  6. Step 6: Final answer
    x = 1,351.82

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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.