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Finding the Fourth Proportional to 1,051.86, 1,452.21 and 698.09

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Solution

The fourth proportional to 1,051.86, 1,452.21 and 698.09 is: 963.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.86 : 1,452.21 = 698.09 : x
  2. Step 2: Convert to fraction form
    1,051.86/1,452.21 = 698.09/x
  3. Step 3: Cross multiply
    1,051.86x = 1,452.21 × 698.09
  4. Step 4: Simplify right side
    1,051.86x = 1,013,773.28
  5. Step 5: Solve for x
    x = 1,013,773.28/1,051.86
  6. Step 6: Final answer
    x = 963.79

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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.