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Finding the Fourth Proportional to 417.65, 576.40 and 251.85

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Solution

The fourth proportional to 417.65, 576.40 and 251.85 is: 347.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.65 : 576.40 = 251.85 : x
  2. Step 2: Convert to fraction form
    417.65/576.40 = 251.85/x
  3. Step 3: Cross multiply
    417.65x = 576.40 × 251.85
  4. Step 4: Simplify right side
    417.65x = 145,166.34
  5. Step 5: Solve for x
    x = 145,166.34/417.65
  6. Step 6: Final answer
    x = 347.58

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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.