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Finding the Fourth Proportional to 307.40, 461.26 and 145.16

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Solution

The fourth proportional to 307.40, 461.26 and 145.16 is: 217.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.40 : 461.26 = 145.16 : x
  2. Step 2: Convert to fraction form
    307.40/461.26 = 145.16/x
  3. Step 3: Cross multiply
    307.40x = 461.26 × 145.16
  4. Step 4: Simplify right side
    307.40x = 66,956.50
  5. Step 5: Solve for x
    x = 66,956.50/307.40
  6. Step 6: Final answer
    x = 217.82

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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.