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Finding the Fourth Proportional to 493.66, 681.51 and 328.42

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Solution

The fourth proportional to 493.66, 681.51 and 328.42 is: 453.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.66 : 681.51 = 328.42 : x
  2. Step 2: Convert to fraction form
    493.66/681.51 = 328.42/x
  3. Step 3: Cross multiply
    493.66x = 681.51 × 328.42
  4. Step 4: Simplify right side
    493.66x = 223,821.51
  5. Step 5: Solve for x
    x = 223,821.51/493.66
  6. Step 6: Final answer
    x = 453.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.