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Finding the Fourth Proportional to 815.98, 1,224.05 and 328.97

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Solution

The fourth proportional to 815.98, 1,224.05 and 328.97 is: 493.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.98 : 1,224.05 = 328.97 : x
  2. Step 2: Convert to fraction form
    815.98/1,224.05 = 328.97/x
  3. Step 3: Cross multiply
    815.98x = 1,224.05 × 328.97
  4. Step 4: Simplify right side
    815.98x = 402,675.73
  5. Step 5: Solve for x
    x = 402,675.73/815.98
  6. Step 6: Final answer
    x = 493.49

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Half scale
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Double scale
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1.5x scale

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.