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Finding the Fourth Proportional to 464.19, 639.95 and 339.86

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Solution

The fourth proportional to 464.19, 639.95 and 339.86 is: 468.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.19 : 639.95 = 339.86 : x
  2. Step 2: Convert to fraction form
    464.19/639.95 = 339.86/x
  3. Step 3: Cross multiply
    464.19x = 639.95 × 339.86
  4. Step 4: Simplify right side
    464.19x = 217,488.51
  5. Step 5: Solve for x
    x = 217,488.51/464.19
  6. Step 6: Final answer
    x = 468.53

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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.