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Finding the Fourth Proportional to 907.56, 1,252.26 and 553.68

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Solution

The fourth proportional to 907.56, 1,252.26 and 553.68 is: 763.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.56 : 1,252.26 = 553.68 : x
  2. Step 2: Convert to fraction form
    907.56/1,252.26 = 553.68/x
  3. Step 3: Cross multiply
    907.56x = 1,252.26 × 553.68
  4. Step 4: Simplify right side
    907.56x = 693,351.32
  5. Step 5: Solve for x
    x = 693,351.32/907.56
  6. Step 6: Final answer
    x = 763.97

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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.