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Finding the Fourth Proportional to 477.66, 717.45 and 417.42

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Solution

The fourth proportional to 477.66, 717.45 and 417.42 is: 626.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.66 : 717.45 = 417.42 : x
  2. Step 2: Convert to fraction form
    477.66/717.45 = 417.42/x
  3. Step 3: Cross multiply
    477.66x = 717.45 × 417.42
  4. Step 4: Simplify right side
    477.66x = 299,477.98
  5. Step 5: Solve for x
    x = 299,477.98/477.66
  6. Step 6: Final answer
    x = 626.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.