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Finding the Fourth Proportional to 421.87, 581.49 and 333.19

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Solution

The fourth proportional to 421.87, 581.49 and 333.19 is: 459.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.87 : 581.49 = 333.19 : x
  2. Step 2: Convert to fraction form
    421.87/581.49 = 333.19/x
  3. Step 3: Cross multiply
    421.87x = 581.49 × 333.19
  4. Step 4: Simplify right side
    421.87x = 193,746.65
  5. Step 5: Solve for x
    x = 193,746.65/421.87
  6. Step 6: Final answer
    x = 459.26

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.