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Finding the Fourth Proportional to 307.40, 461.15 and 115.04

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Solution

The fourth proportional to 307.40, 461.15 and 115.04 is: 172.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.40 : 461.15 = 115.04 : x
  2. Step 2: Convert to fraction form
    307.40/461.15 = 115.04/x
  3. Step 3: Cross multiply
    307.40x = 461.15 × 115.04
  4. Step 4: Simplify right side
    307.40x = 53,050.70
  5. Step 5: Solve for x
    x = 53,050.70/307.40
  6. Step 6: Final answer
    x = 172.58

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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.