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Finding the Fourth Proportional to 907.19, 1,251.92 and 514.24

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Solution

The fourth proportional to 907.19, 1,251.92 and 514.24 is: 709.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.19 : 1,251.92 = 514.24 : x
  2. Step 2: Convert to fraction form
    907.19/1,251.92 = 514.24/x
  3. Step 3: Cross multiply
    907.19x = 1,251.92 × 514.24
  4. Step 4: Simplify right side
    907.19x = 643,787.34
  5. Step 5: Solve for x
    x = 643,787.34/907.19
  6. Step 6: Final answer
    x = 709.65

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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.