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Finding the Fourth Proportional to 777.96, 1,073.47 and 446.27

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Solution

The fourth proportional to 777.96, 1,073.47 and 446.27 is: 615.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.96 : 1,073.47 = 446.27 : x
  2. Step 2: Convert to fraction form
    777.96/1,073.47 = 446.27/x
  3. Step 3: Cross multiply
    777.96x = 1,073.47 × 446.27
  4. Step 4: Simplify right side
    777.96x = 479,051.81
  5. Step 5: Solve for x
    x = 479,051.81/777.96
  6. Step 6: Final answer
    x = 615.78

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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.