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Finding the Fourth Proportional to 307.49, 460.88 and 215.69

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Solution

The fourth proportional to 307.49, 460.88 and 215.69 is: 323.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.49 : 460.88 = 215.69 : x
  2. Step 2: Convert to fraction form
    307.49/460.88 = 215.69/x
  3. Step 3: Cross multiply
    307.49x = 460.88 × 215.69
  4. Step 4: Simplify right side
    307.49x = 99,406.13
  5. Step 5: Solve for x
    x = 99,406.13/307.49
  6. Step 6: Final answer
    x = 323.28

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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.