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Finding the Fourth Proportional to 907.25, 1,360.89 and 359.43

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Solution

The fourth proportional to 907.25, 1,360.89 and 359.43 is: 539.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.25 : 1,360.89 = 359.43 : x
  2. Step 2: Convert to fraction form
    907.25/1,360.89 = 359.43/x
  3. Step 3: Cross multiply
    907.25x = 1,360.89 × 359.43
  4. Step 4: Simplify right side
    907.25x = 489,144.69
  5. Step 5: Solve for x
    x = 489,144.69/907.25
  6. Step 6: Final answer
    x = 539.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.