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Finding the Fourth Proportional to 417.51, 576.21 and 242.85

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Solution

The fourth proportional to 417.51, 576.21 and 242.85 is: 335.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.51 : 576.21 = 242.85 : x
  2. Step 2: Convert to fraction form
    417.51/576.21 = 242.85/x
  3. Step 3: Cross multiply
    417.51x = 576.21 × 242.85
  4. Step 4: Simplify right side
    417.51x = 139,932.60
  5. Step 5: Solve for x
    x = 139,932.60/417.51
  6. Step 6: Final answer
    x = 335.16

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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.