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Finding the Fourth Proportional to 908.84, 1,363.50 and 259.63

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Solution

The fourth proportional to 908.84, 1,363.50 and 259.63 is: 389.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.84 : 1,363.50 = 259.63 : x
  2. Step 2: Convert to fraction form
    908.84/1,363.50 = 259.63/x
  3. Step 3: Cross multiply
    908.84x = 1,363.50 × 259.63
  4. Step 4: Simplify right side
    908.84x = 354,002.10
  5. Step 5: Solve for x
    x = 354,002.10/908.84
  6. Step 6: Final answer
    x = 389.51

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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.