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Finding the Fourth Proportional to 907, 1,251.61 and 514

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Solution

The fourth proportional to 907, 1,251.61 and 514 is: 709.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    907 : 1,251.61 = 514 : x
  2. Step 2: Convert to fraction form
    907/1,251.61 = 514/x
  3. Step 3: Cross multiply
    907x = 1,251.61 × 514
  4. Step 4: Simplify right side
    907x = 643,327.54
  5. Step 5: Solve for x
    x = 643,327.54/907
  6. Step 6: Final answer
    x = 709.29

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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.