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Finding the Fourth Proportional to 1,050.90, 1,449.60 and 696.84

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Solution

The fourth proportional to 1,050.90, 1,449.60 and 696.84 is: 961.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.90 : 1,449.60 = 696.84 : x
  2. Step 2: Convert to fraction form
    1,050.90/1,449.60 = 696.84/x
  3. Step 3: Cross multiply
    1,050.90x = 1,449.60 × 696.84
  4. Step 4: Simplify right side
    1,050.90x = 1,010,139.26
  5. Step 5: Solve for x
    x = 1,010,139.26/1,050.90
  6. Step 6: Final answer
    x = 961.21

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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.