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Finding the Fourth Proportional to 930.12, 1,283.58 and 516.12

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Solution

The fourth proportional to 930.12, 1,283.58 and 516.12 is: 712.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.12 : 1,283.58 = 516.12 : x
  2. Step 2: Convert to fraction form
    930.12/1,283.58 = 516.12/x
  3. Step 3: Cross multiply
    930.12x = 1,283.58 × 516.12
  4. Step 4: Simplify right side
    930.12x = 662,481.31
  5. Step 5: Solve for x
    x = 662,481.31/930.12
  6. Step 6: Final answer
    x = 712.25

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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.