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Finding the Fourth Proportional to 909.59, 1,363.78 and 498.41

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Solution

The fourth proportional to 909.59, 1,363.78 and 498.41 is: 747.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.59 : 1,363.78 = 498.41 : x
  2. Step 2: Convert to fraction form
    909.59/1,363.78 = 498.41/x
  3. Step 3: Cross multiply
    909.59x = 1,363.78 × 498.41
  4. Step 4: Simplify right side
    909.59x = 679,721.59
  5. Step 5: Solve for x
    x = 679,721.59/909.59
  6. Step 6: Final answer
    x = 747.28

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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.