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Finding the Fourth Proportional to 908.47, 1,362.91 and 259.25

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Solution

The fourth proportional to 908.47, 1,362.91 and 259.25 is: 388.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.47 : 1,362.91 = 259.25 : x
  2. Step 2: Convert to fraction form
    908.47/1,362.91 = 259.25/x
  3. Step 3: Cross multiply
    908.47x = 1,362.91 × 259.25
  4. Step 4: Simplify right side
    908.47x = 353,337.18
  5. Step 5: Solve for x
    x = 353,337.18/908.47
  6. Step 6: Final answer
    x = 388.94

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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.