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Finding the Fourth Proportional to 777.83, 1,073.42 and 446.32

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Solution

The fourth proportional to 777.83, 1,073.42 and 446.32 is: 615.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.83 : 1,073.42 = 446.32 : x
  2. Step 2: Convert to fraction form
    777.83/1,073.42 = 446.32/x
  3. Step 3: Cross multiply
    777.83x = 1,073.42 × 446.32
  4. Step 4: Simplify right side
    777.83x = 479,087.25
  5. Step 5: Solve for x
    x = 479,087.25/777.83
  6. Step 6: Final answer
    x = 615.93

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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.