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Finding the Fourth Proportional to 777.74, 1,073.44 and 446.39

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Solution

The fourth proportional to 777.74, 1,073.44 and 446.39 is: 616.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.74 : 1,073.44 = 446.39 : x
  2. Step 2: Convert to fraction form
    777.74/1,073.44 = 446.39/x
  3. Step 3: Cross multiply
    777.74x = 1,073.44 × 446.39
  4. Step 4: Simplify right side
    777.74x = 479,172.88
  5. Step 5: Solve for x
    x = 479,172.88/777.74
  6. Step 6: Final answer
    x = 616.11

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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.