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Finding the Fourth Proportional to 466.41, 643.77 and 279.93

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Solution

The fourth proportional to 466.41, 643.77 and 279.93 is: 386.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.41 : 643.77 = 279.93 : x
  2. Step 2: Convert to fraction form
    466.41/643.77 = 279.93/x
  3. Step 3: Cross multiply
    466.41x = 643.77 × 279.93
  4. Step 4: Simplify right side
    466.41x = 180,211.93
  5. Step 5: Solve for x
    x = 180,211.93/466.41
  6. Step 6: Final answer
    x = 386.38

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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.