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Finding the Fourth Proportional to 906.35, 1,250.69 and 513.32

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Solution

The fourth proportional to 906.35, 1,250.69 and 513.32 is: 708.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.35 : 1,250.69 = 513.32 : x
  2. Step 2: Convert to fraction form
    906.35/1,250.69 = 513.32/x
  3. Step 3: Cross multiply
    906.35x = 1,250.69 × 513.32
  4. Step 4: Simplify right side
    906.35x = 641,995.37
  5. Step 5: Solve for x
    x = 641,995.37/906.35
  6. Step 6: Final answer
    x = 708.33

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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.