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Finding the Fourth Proportional to 906.56, 1,250.64 and 637.40

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Solution

The fourth proportional to 906.56, 1,250.64 and 637.40 is: 879.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.56 : 1,250.64 = 637.40 : x
  2. Step 2: Convert to fraction form
    906.56/1,250.64 = 637.40/x
  3. Step 3: Cross multiply
    906.56x = 1,250.64 × 637.40
  4. Step 4: Simplify right side
    906.56x = 797,157.94
  5. Step 5: Solve for x
    x = 797,157.94/906.56
  6. Step 6: Final answer
    x = 879.32

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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.