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Finding the Fourth Proportional to 417.76, 576.32 and 307.19

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Solution

The fourth proportional to 417.76, 576.32 and 307.19 is: 423.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.76 : 576.32 = 307.19 : x
  2. Step 2: Convert to fraction form
    417.76/576.32 = 307.19/x
  3. Step 3: Cross multiply
    417.76x = 576.32 × 307.19
  4. Step 4: Simplify right side
    417.76x = 177,039.65
  5. Step 5: Solve for x
    x = 177,039.65/417.76
  6. Step 6: Final answer
    x = 423.79

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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.