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Finding the Fourth Proportional to 906.42, 1,250.72 and 513.43

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Solution

The fourth proportional to 906.42, 1,250.72 and 513.43 is: 708.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.42 : 1,250.72 = 513.43 : x
  2. Step 2: Convert to fraction form
    906.42/1,250.72 = 513.43/x
  3. Step 3: Cross multiply
    906.42x = 1,250.72 × 513.43
  4. Step 4: Simplify right side
    906.42x = 642,157.17
  5. Step 5: Solve for x
    x = 642,157.17/906.42
  6. Step 6: Final answer
    x = 708.45

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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.