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Finding the Fourth Proportional to 290.55, 401.29 and 192.74

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Solution

The fourth proportional to 290.55, 401.29 and 192.74 is: 266.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.55 : 401.29 = 192.74 : x
  2. Step 2: Convert to fraction form
    290.55/401.29 = 192.74/x
  3. Step 3: Cross multiply
    290.55x = 401.29 × 192.74
  4. Step 4: Simplify right side
    290.55x = 77,345.16
  5. Step 5: Solve for x
    x = 77,345.16/290.55
  6. Step 6: Final answer
    x = 266.20

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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.