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Finding the Fourth Proportional to 1,064.99, 1,469.45 and 671.78

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Solution

The fourth proportional to 1,064.99, 1,469.45 and 671.78 is: 926.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.99 : 1,469.45 = 671.78 : x
  2. Step 2: Convert to fraction form
    1,064.99/1,469.45 = 671.78/x
  3. Step 3: Cross multiply
    1,064.99x = 1,469.45 × 671.78
  4. Step 4: Simplify right side
    1,064.99x = 987,147.12
  5. Step 5: Solve for x
    x = 987,147.12/1,064.99
  6. Step 6: Final answer
    x = 926.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.