Home / 2,990.90-4,480.40-2,338.58

Finding the Fourth Proportional to 2,990.90, 4,480.40 and 2,338.58

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Solution

The fourth proportional to 2,990.90, 4,480.40 and 2,338.58 is: 3,503.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.90 : 4,480.40 = 2,338.58 : x
  2. Step 2: Convert to fraction form
    2,990.90/4,480.40 = 2,338.58/x
  3. Step 3: Cross multiply
    2,990.90x = 4,480.40 × 2,338.58
  4. Step 4: Simplify right side
    2,990.90x = 10,477,773.83
  5. Step 5: Solve for x
    x = 10,477,773.83/2,990.90
  6. Step 6: Final answer
    x = 3,503.22

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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.