Home / 2,990.18-4,128.17-2,325.58

Finding the Fourth Proportional to 2,990.18, 4,128.17 and 2,325.58

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Solution

The fourth proportional to 2,990.18, 4,128.17 and 2,325.58 is: 3,210.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.18 : 4,128.17 = 2,325.58 : x
  2. Step 2: Convert to fraction form
    2,990.18/4,128.17 = 2,325.58/x
  3. Step 3: Cross multiply
    2,990.18x = 4,128.17 × 2,325.58
  4. Step 4: Simplify right side
    2,990.18x = 9,600,367.64
  5. Step 5: Solve for x
    x = 9,600,367.64/2,990.18
  6. Step 6: Final answer
    x = 3,210.63

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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.