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Finding the Fourth Proportional to 307.74, 461.46 and 153.72

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Solution

The fourth proportional to 307.74, 461.46 and 153.72 is: 230.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.74 : 461.46 = 153.72 : x
  2. Step 2: Convert to fraction form
    307.74/461.46 = 153.72/x
  3. Step 3: Cross multiply
    307.74x = 461.46 × 153.72
  4. Step 4: Simplify right side
    307.74x = 70,935.63
  5. Step 5: Solve for x
    x = 70,935.63/307.74
  6. Step 6: Final answer
    x = 230.51

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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.