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Finding the Fourth Proportional to 290.42, 435.62 and 73.99

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Solution

The fourth proportional to 290.42, 435.62 and 73.99 is: 110.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.42 : 435.62 = 73.99 : x
  2. Step 2: Convert to fraction form
    290.42/435.62 = 73.99/x
  3. Step 3: Cross multiply
    290.42x = 435.62 × 73.99
  4. Step 4: Simplify right side
    290.42x = 32,231.15
  5. Step 5: Solve for x
    x = 32,231.15/290.42
  6. Step 6: Final answer
    x = 110.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.