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Finding the Fourth Proportional to 448.50, 668.87 and 417.72

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Solution

The fourth proportional to 448.50, 668.87 and 417.72 is: 622.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.50 : 668.87 = 417.72 : x
  2. Step 2: Convert to fraction form
    448.50/668.87 = 417.72/x
  3. Step 3: Cross multiply
    448.50x = 668.87 × 417.72
  4. Step 4: Simplify right side
    448.50x = 279,400.38
  5. Step 5: Solve for x
    x = 279,400.38/448.50
  6. Step 6: Final answer
    x = 622.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.