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Finding the Fourth Proportional to 307.22, 460.95 and 142.77

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Solution

The fourth proportional to 307.22, 460.95 and 142.77 is: 214.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.22 : 460.95 = 142.77 : x
  2. Step 2: Convert to fraction form
    307.22/460.95 = 142.77/x
  3. Step 3: Cross multiply
    307.22x = 460.95 × 142.77
  4. Step 4: Simplify right side
    307.22x = 65,809.12
  5. Step 5: Solve for x
    x = 65,809.12/307.22
  6. Step 6: Final answer
    x = 214.21

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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.