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Finding the Fourth Proportional to 907.25, 1,252.02 and 493.25

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Solution

The fourth proportional to 907.25, 1,252.02 and 493.25 is: 680.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.25 : 1,252.02 = 493.25 : x
  2. Step 2: Convert to fraction form
    907.25/1,252.02 = 493.25/x
  3. Step 3: Cross multiply
    907.25x = 1,252.02 × 493.25
  4. Step 4: Simplify right side
    907.25x = 617,558.87
  5. Step 5: Solve for x
    x = 617,558.87/907.25
  6. Step 6: Final answer
    x = 680.69

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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.