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Finding the Fourth Proportional to 404.36, 607.15 and 231.22

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Solution

The fourth proportional to 404.36, 607.15 and 231.22 is: 347.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.36 : 607.15 = 231.22 : x
  2. Step 2: Convert to fraction form
    404.36/607.15 = 231.22/x
  3. Step 3: Cross multiply
    404.36x = 607.15 × 231.22
  4. Step 4: Simplify right side
    404.36x = 140,384.07
  5. Step 5: Solve for x
    x = 140,384.07/404.36
  6. Step 6: Final answer
    x = 347.18

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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.