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Finding the Fourth Proportional to 307.45, 461.29 and 143.00

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Solution

The fourth proportional to 307.45, 461.29 and 143.00 is: 214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.45 : 461.29 = 143.00 : x
  2. Step 2: Convert to fraction form
    307.45/461.29 = 143.00/x
  3. Step 3: Cross multiply
    307.45x = 461.29 × 143.00
  4. Step 4: Simplify right side
    307.45x = 65,963.40
  5. Step 5: Solve for x
    x = 65,963.40/307.45
  6. Step 6: Final answer
    x = 214.55

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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.