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Finding the Fourth Proportional to 466.07, 643.04 and 289.05

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Solution

The fourth proportional to 466.07, 643.04 and 289.05 is: 398.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.07 : 643.04 = 289.05 : x
  2. Step 2: Convert to fraction form
    466.07/643.04 = 289.05/x
  3. Step 3: Cross multiply
    466.07x = 643.04 × 289.05
  4. Step 4: Simplify right side
    466.07x = 185,869.27
  5. Step 5: Solve for x
    x = 185,869.27/466.07
  6. Step 6: Final answer
    x = 398.81

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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.