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Finding the Fourth Proportional to 1,443.67, 2,166.08 and 469.78

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Solution

The fourth proportional to 1,443.67, 2,166.08 and 469.78 is: 704.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,443.67 : 2,166.08 = 469.78 : x
  2. Step 2: Convert to fraction form
    1,443.67/2,166.08 = 469.78/x
  3. Step 3: Cross multiply
    1,443.67x = 2,166.08 × 469.78
  4. Step 4: Simplify right side
    1,443.67x = 1,017,573.30
  5. Step 5: Solve for x
    x = 1,017,573.30/1,443.67
  6. Step 6: Final answer
    x = 704.85

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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.