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Finding the Fourth Proportional to 447.69, 618.10 and 307.77

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Solution

The fourth proportional to 447.69, 618.10 and 307.77 is: 424.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.69 : 618.10 = 307.77 : x
  2. Step 2: Convert to fraction form
    447.69/618.10 = 307.77/x
  3. Step 3: Cross multiply
    447.69x = 618.10 × 307.77
  4. Step 4: Simplify right side
    447.69x = 190,229.55
  5. Step 5: Solve for x
    x = 190,229.55/447.69
  6. Step 6: Final answer
    x = 424.91

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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.