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Finding the Fourth Proportional to 328.79, 495.18 and 290.66

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Solution

The fourth proportional to 328.79, 495.18 and 290.66 is: 437.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.79 : 495.18 = 290.66 : x
  2. Step 2: Convert to fraction form
    328.79/495.18 = 290.66/x
  3. Step 3: Cross multiply
    328.79x = 495.18 × 290.66
  4. Step 4: Simplify right side
    328.79x = 143,926.54
  5. Step 5: Solve for x
    x = 143,926.54/328.79
  6. Step 6: Final answer
    x = 437.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.