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Finding the Fourth Proportional to 907.75, 1,359.78 and 634.42

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Solution

The fourth proportional to 907.75, 1,359.78 and 634.42 is: 950.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.75 : 1,359.78 = 634.42 : x
  2. Step 2: Convert to fraction form
    907.75/1,359.78 = 634.42/x
  3. Step 3: Cross multiply
    907.75x = 1,359.78 × 634.42
  4. Step 4: Simplify right side
    907.75x = 862,671.63
  5. Step 5: Solve for x
    x = 862,671.63/907.75
  6. Step 6: Final answer
    x = 950.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.