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Finding the Fourth Proportional to 907.07, 1,251.74 and 493.07

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Solution

The fourth proportional to 907.07, 1,251.74 and 493.07 is: 680.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.07 : 1,251.74 = 493.07 : x
  2. Step 2: Convert to fraction form
    907.07/1,251.74 = 493.07/x
  3. Step 3: Cross multiply
    907.07x = 1,251.74 × 493.07
  4. Step 4: Simplify right side
    907.07x = 617,195.44
  5. Step 5: Solve for x
    x = 617,195.44/907.07
  6. Step 6: Final answer
    x = 680.43

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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.