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Finding the Fourth Proportional to 803.14, 1,107.93 and 625.78

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Solution

The fourth proportional to 803.14, 1,107.93 and 625.78 is: 863.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.14 : 1,107.93 = 625.78 : x
  2. Step 2: Convert to fraction form
    803.14/1,107.93 = 625.78/x
  3. Step 3: Cross multiply
    803.14x = 1,107.93 × 625.78
  4. Step 4: Simplify right side
    803.14x = 693,320.44
  5. Step 5: Solve for x
    x = 693,320.44/803.14
  6. Step 6: Final answer
    x = 863.26

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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.