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Finding the Fourth Proportional to 464.47, 640.77 and 339.94

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Solution

The fourth proportional to 464.47, 640.77 and 339.94 is: 468.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.47 : 640.77 = 339.94 : x
  2. Step 2: Convert to fraction form
    464.47/640.77 = 339.94/x
  3. Step 3: Cross multiply
    464.47x = 640.77 × 339.94
  4. Step 4: Simplify right side
    464.47x = 217,823.35
  5. Step 5: Solve for x
    x = 217,823.35/464.47
  6. Step 6: Final answer
    x = 468.97

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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.