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Finding the Fourth Proportional to 1,469.21, 2,204.42 and 776.66

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Solution

The fourth proportional to 1,469.21, 2,204.42 and 776.66 is: 1,165.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,469.21 : 2,204.42 = 776.66 : x
  2. Step 2: Convert to fraction form
    1,469.21/2,204.42 = 776.66/x
  3. Step 3: Cross multiply
    1,469.21x = 2,204.42 × 776.66
  4. Step 4: Simplify right side
    1,469.21x = 1,712,069.93
  5. Step 5: Solve for x
    x = 1,712,069.93/1,469.21
  6. Step 6: Final answer
    x = 1,165.30

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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.