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Finding the Fourth Proportional to 290.79, 437.74 and 223.16

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Solution

The fourth proportional to 290.79, 437.74 and 223.16 is: 335.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.79 : 437.74 = 223.16 : x
  2. Step 2: Convert to fraction form
    290.79/437.74 = 223.16/x
  3. Step 3: Cross multiply
    290.79x = 437.74 × 223.16
  4. Step 4: Simplify right side
    290.79x = 97,683.31
  5. Step 5: Solve for x
    x = 97,683.31/290.79
  6. Step 6: Final answer
    x = 335.92

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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.