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Finding the Fourth Proportional to 777.57, 1,073.13 and 516.15

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Solution

The fourth proportional to 777.57, 1,073.13 and 516.15 is: 712.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.57 : 1,073.13 = 516.15 : x
  2. Step 2: Convert to fraction form
    777.57/1,073.13 = 516.15/x
  3. Step 3: Cross multiply
    777.57x = 1,073.13 × 516.15
  4. Step 4: Simplify right side
    777.57x = 553,896.05
  5. Step 5: Solve for x
    x = 553,896.05/777.57
  6. Step 6: Final answer
    x = 712.34

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1.5x scale

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.