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Finding the Fourth Proportional to 4,990.38, 7,484.72 and 1,480.31

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Solution

The fourth proportional to 4,990.38, 7,484.72 and 1,480.31 is: 2,220.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.38 : 7,484.72 = 1,480.31 : x
  2. Step 2: Convert to fraction form
    4,990.38/7,484.72 = 1,480.31/x
  3. Step 3: Cross multiply
    4,990.38x = 7,484.72 × 1,480.31
  4. Step 4: Simplify right side
    4,990.38x = 11,079,661.04
  5. Step 5: Solve for x
    x = 11,079,661.04/4,990.38
  6. Step 6: Final answer
    x = 2,220.20

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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.