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Finding the Fourth Proportional to 2,980.85, 4,472.16 and 900.92

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Solution

The fourth proportional to 2,980.85, 4,472.16 and 900.92 is: 1,351.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.85 : 4,472.16 = 900.92 : x
  2. Step 2: Convert to fraction form
    2,980.85/4,472.16 = 900.92/x
  3. Step 3: Cross multiply
    2,980.85x = 4,472.16 × 900.92
  4. Step 4: Simplify right side
    2,980.85x = 4,029,036.03
  5. Step 5: Solve for x
    x = 4,029,036.03/2,980.85
  6. Step 6: Final answer
    x = 1,351.64

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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.