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Finding the Fourth Proportional to 466.10, 643.34 and 318.79

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Solution

The fourth proportional to 466.10, 643.34 and 318.79 is: 440.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.10 : 643.34 = 318.79 : x
  2. Step 2: Convert to fraction form
    466.10/643.34 = 318.79/x
  3. Step 3: Cross multiply
    466.10x = 643.34 × 318.79
  4. Step 4: Simplify right side
    466.10x = 205,088.34
  5. Step 5: Solve for x
    x = 205,088.34/466.10
  6. Step 6: Final answer
    x = 440.01

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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.