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Finding the Fourth Proportional to 513.07, 708.02 and 280.19

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Solution

The fourth proportional to 513.07, 708.02 and 280.19 is: 386.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.07 : 708.02 = 280.19 : x
  2. Step 2: Convert to fraction form
    513.07/708.02 = 280.19/x
  3. Step 3: Cross multiply
    513.07x = 708.02 × 280.19
  4. Step 4: Simplify right side
    513.07x = 198,380.12
  5. Step 5: Solve for x
    x = 198,380.12/513.07
  6. Step 6: Final answer
    x = 386.65

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Double scale
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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.