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Finding the Fourth Proportional to 907.40, 1,249.56 and 808.04

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Solution

The fourth proportional to 907.40, 1,249.56 and 808.04 is: 1,112.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.40 : 1,249.56 = 808.04 : x
  2. Step 2: Convert to fraction form
    907.40/1,249.56 = 808.04/x
  3. Step 3: Cross multiply
    907.40x = 1,249.56 × 808.04
  4. Step 4: Simplify right side
    907.40x = 1,009,694.46
  5. Step 5: Solve for x
    x = 1,009,694.46/907.40
  6. Step 6: Final answer
    x = 1,112.73

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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.