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Finding the Fourth Proportional to 307.18, 460.72 and 87.82

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Solution

The fourth proportional to 307.18, 460.72 and 87.82 is: 131.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.18 : 460.72 = 87.82 : x
  2. Step 2: Convert to fraction form
    307.18/460.72 = 87.82/x
  3. Step 3: Cross multiply
    307.18x = 460.72 × 87.82
  4. Step 4: Simplify right side
    307.18x = 40,460.43
  5. Step 5: Solve for x
    x = 40,460.43/307.18
  6. Step 6: Final answer
    x = 131.72

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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.