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Finding the Fourth Proportional to 307.64, 460.04 and 215.70

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Solution

The fourth proportional to 307.64, 460.04 and 215.70 is: 322.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.64 : 460.04 = 215.70 : x
  2. Step 2: Convert to fraction form
    307.64/460.04 = 215.70/x
  3. Step 3: Cross multiply
    307.64x = 460.04 × 215.70
  4. Step 4: Simplify right side
    307.64x = 99,229.55
  5. Step 5: Solve for x
    x = 99,229.55/307.64
  6. Step 6: Final answer
    x = 322.56

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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.