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Finding the Fourth Proportional to 307.89, 424.90 and 168.01

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Solution

The fourth proportional to 307.89, 424.90 and 168.01 is: 231.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.89 : 424.90 = 168.01 : x
  2. Step 2: Convert to fraction form
    307.89/424.90 = 168.01/x
  3. Step 3: Cross multiply
    307.89x = 424.90 × 168.01
  4. Step 4: Simplify right side
    307.89x = 71,386.61
  5. Step 5: Solve for x
    x = 71,386.61/307.89
  6. Step 6: Final answer
    x = 231.85

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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.