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Finding the Fourth Proportional to 908.42, 1,363.08 and 619.28

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Solution

The fourth proportional to 908.42, 1,363.08 and 619.28 is: 929.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.42 : 1,363.08 = 619.28 : x
  2. Step 2: Convert to fraction form
    908.42/1,363.08 = 619.28/x
  3. Step 3: Cross multiply
    908.42x = 1,363.08 × 619.28
  4. Step 4: Simplify right side
    908.42x = 844,128.18
  5. Step 5: Solve for x
    x = 844,128.18/908.42
  6. Step 6: Final answer
    x = 929.23

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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.