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Finding the Fourth Proportional to 777.83, 1,073.39 and 423.75

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Solution

The fourth proportional to 777.83, 1,073.39 and 423.75 is: 584.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.83 : 1,073.39 = 423.75 : x
  2. Step 2: Convert to fraction form
    777.83/1,073.39 = 423.75/x
  3. Step 3: Cross multiply
    777.83x = 1,073.39 × 423.75
  4. Step 4: Simplify right side
    777.83x = 454,846.89
  5. Step 5: Solve for x
    x = 454,846.89/777.83
  6. Step 6: Final answer
    x = 584.77

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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.