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Finding the Fourth Proportional to 664.05, 916.53 and 464.79

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Solution

The fourth proportional to 664.05, 916.53 and 464.79 is: 641.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.05 : 916.53 = 464.79 : x
  2. Step 2: Convert to fraction form
    664.05/916.53 = 464.79/x
  3. Step 3: Cross multiply
    664.05x = 916.53 × 464.79
  4. Step 4: Simplify right side
    664.05x = 425,993.98
  5. Step 5: Solve for x
    x = 425,993.98/664.05
  6. Step 6: Final answer
    x = 641.51

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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.