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Finding the Fourth Proportional to 417.55, 576.18 and 242.89

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Solution

The fourth proportional to 417.55, 576.18 and 242.89 is: 335.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.55 : 576.18 = 242.89 : x
  2. Step 2: Convert to fraction form
    417.55/576.18 = 242.89/x
  3. Step 3: Cross multiply
    417.55x = 576.18 × 242.89
  4. Step 4: Simplify right side
    417.55x = 139,948.36
  5. Step 5: Solve for x
    x = 139,948.36/417.55
  6. Step 6: Final answer
    x = 335.17

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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.