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Finding the Fourth Proportional to 513.40, 708.51 and 303.49

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Solution

The fourth proportional to 513.40, 708.51 and 303.49 is: 418.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.40 : 708.51 = 303.49 : x
  2. Step 2: Convert to fraction form
    513.40/708.51 = 303.49/x
  3. Step 3: Cross multiply
    513.40x = 708.51 × 303.49
  4. Step 4: Simplify right side
    513.40x = 215,025.70
  5. Step 5: Solve for x
    x = 215,025.70/513.40
  6. Step 6: Final answer
    x = 418.83

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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.