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Finding the Fourth Proportional to 290.66, 400.98 and 192.40

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Solution

The fourth proportional to 290.66, 400.98 and 192.40 is: 265.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.66 : 400.98 = 192.40 : x
  2. Step 2: Convert to fraction form
    290.66/400.98 = 192.40/x
  3. Step 3: Cross multiply
    290.66x = 400.98 × 192.40
  4. Step 4: Simplify right side
    290.66x = 77,148.55
  5. Step 5: Solve for x
    x = 77,148.55/290.66
  6. Step 6: Final answer
    x = 265.43

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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.