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Finding the Fourth Proportional to 907.98, 1,252.92 and 514.98

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Solution

The fourth proportional to 907.98, 1,252.92 and 514.98 is: 710.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.98 : 1,252.92 = 514.98 : x
  2. Step 2: Convert to fraction form
    907.98/1,252.92 = 514.98/x
  3. Step 3: Cross multiply
    907.98x = 1,252.92 × 514.98
  4. Step 4: Simplify right side
    907.98x = 645,228.74
  5. Step 5: Solve for x
    x = 645,228.74/907.98
  6. Step 6: Final answer
    x = 710.62

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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.