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Finding the Fourth Proportional to 1,801.60, 2,701.09 and 1,215.15

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Solution

The fourth proportional to 1,801.60, 2,701.09 and 1,215.15 is: 1,821.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801.60 : 2,701.09 = 1,215.15 : x
  2. Step 2: Convert to fraction form
    1,801.60/2,701.09 = 1,215.15/x
  3. Step 3: Cross multiply
    1,801.60x = 2,701.09 × 1,215.15
  4. Step 4: Simplify right side
    1,801.60x = 3,282,216.01
  5. Step 5: Solve for x
    x = 3,282,216.01/1,801.60
  6. Step 6: Final answer
    x = 1,821.83

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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.