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Finding the Fourth Proportional to 309.99, 464.71 and 147.59

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Solution

The fourth proportional to 309.99, 464.71 and 147.59 is: 221.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.99 : 464.71 = 147.59 : x
  2. Step 2: Convert to fraction form
    309.99/464.71 = 147.59/x
  3. Step 3: Cross multiply
    309.99x = 464.71 × 147.59
  4. Step 4: Simplify right side
    309.99x = 68,586.55
  5. Step 5: Solve for x
    x = 68,586.55/309.99
  6. Step 6: Final answer
    x = 221.25

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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.