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Finding the Fourth Proportional to 2,830.13, 4,244.32 and 980.81

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Solution

The fourth proportional to 2,830.13, 4,244.32 and 980.81 is: 1,470.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.13 : 4,244.32 = 980.81 : x
  2. Step 2: Convert to fraction form
    2,830.13/4,244.32 = 980.81/x
  3. Step 3: Cross multiply
    2,830.13x = 4,244.32 × 980.81
  4. Step 4: Simplify right side
    2,830.13x = 4,162,850.28
  5. Step 5: Solve for x
    x = 4,162,850.28/2,830.13
  6. Step 6: Final answer
    x = 1,470.91

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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.