Home / 3,089.60-4,625.20-1,990.72

Finding the Fourth Proportional to 3,089.60, 4,625.20 and 1,990.72

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Solution

The fourth proportional to 3,089.60, 4,625.20 and 1,990.72 is: 2,980.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,089.60 : 4,625.20 = 1,990.72 : x
  2. Step 2: Convert to fraction form
    3,089.60/4,625.20 = 1,990.72/x
  3. Step 3: Cross multiply
    3,089.60x = 4,625.20 × 1,990.72
  4. Step 4: Simplify right side
    3,089.60x = 9,207,478.14
  5. Step 5: Solve for x
    x = 9,207,478.14/3,089.60
  6. Step 6: Final answer
    x = 2,980.15

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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.