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Finding the Fourth Proportional to 907.29, 1,251.99 and 553.23

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Solution

The fourth proportional to 907.29, 1,251.99 and 553.23 is: 763.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.29 : 1,251.99 = 553.23 : x
  2. Step 2: Convert to fraction form
    907.29/1,251.99 = 553.23/x
  3. Step 3: Cross multiply
    907.29x = 1,251.99 × 553.23
  4. Step 4: Simplify right side
    907.29x = 692,638.43
  5. Step 5: Solve for x
    x = 692,638.43/907.29
  6. Step 6: Final answer
    x = 763.41

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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.