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Finding the Fourth Proportional to 387.99, 581.45 and 224.84

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Solution

The fourth proportional to 387.99, 581.45 and 224.84 is: 336.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.99 : 581.45 = 224.84 : x
  2. Step 2: Convert to fraction form
    387.99/581.45 = 224.84/x
  3. Step 3: Cross multiply
    387.99x = 581.45 × 224.84
  4. Step 4: Simplify right side
    387.99x = 130,733.55
  5. Step 5: Solve for x
    x = 130,733.55/387.99
  6. Step 6: Final answer
    x = 336.95

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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.