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Finding the Fourth Proportional to 907.81, 1,252.72 and 514.73

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Solution

The fourth proportional to 907.81, 1,252.72 and 514.73 is: 710.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.81 : 1,252.72 = 514.73 : x
  2. Step 2: Convert to fraction form
    907.81/1,252.72 = 514.73/x
  3. Step 3: Cross multiply
    907.81x = 1,252.72 × 514.73
  4. Step 4: Simplify right side
    907.81x = 644,812.57
  5. Step 5: Solve for x
    x = 644,812.57/907.81
  6. Step 6: Final answer
    x = 710.29

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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.