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Finding the Fourth Proportional to 306.36, 461.70 and 288.12

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Solution

The fourth proportional to 306.36, 461.70 and 288.12 is: 434.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.36 : 461.70 = 288.12 : x
  2. Step 2: Convert to fraction form
    306.36/461.70 = 288.12/x
  3. Step 3: Cross multiply
    306.36x = 461.70 × 288.12
  4. Step 4: Simplify right side
    306.36x = 133,025.00
  5. Step 5: Solve for x
    x = 133,025.00/306.36
  6. Step 6: Final answer
    x = 434.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.