Home / 3,520.89-5,279.63-1,329.80

Finding the Fourth Proportional to 3,520.89, 5,279.63 and 1,329.80

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Solution

The fourth proportional to 3,520.89, 5,279.63 and 1,329.80 is: 1,994.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,520.89 : 5,279.63 = 1,329.80 : x
  2. Step 2: Convert to fraction form
    3,520.89/5,279.63 = 1,329.80/x
  3. Step 3: Cross multiply
    3,520.89x = 5,279.63 × 1,329.80
  4. Step 4: Simplify right side
    3,520.89x = 7,020,818.93
  5. Step 5: Solve for x
    x = 7,020,818.93/3,520.89
  6. Step 6: Final answer
    x = 1,994.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.