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Finding the Fourth Proportional to 907.62, 1,252.31 and 553.74

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Solution

The fourth proportional to 907.62, 1,252.31 and 553.74 is: 764.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.62 : 1,252.31 = 553.74 : x
  2. Step 2: Convert to fraction form
    907.62/1,252.31 = 553.74/x
  3. Step 3: Cross multiply
    907.62x = 1,252.31 × 553.74
  4. Step 4: Simplify right side
    907.62x = 693,454.14
  5. Step 5: Solve for x
    x = 693,454.14/907.62
  6. Step 6: Final answer
    x = 764.04

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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.