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Finding the Fourth Proportional to 906.08, 1,243.72 and 805.64

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Solution

The fourth proportional to 906.08, 1,243.72 and 805.64 is: 1,105.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.08 : 1,243.72 = 805.64 : x
  2. Step 2: Convert to fraction form
    906.08/1,243.72 = 805.64/x
  3. Step 3: Cross multiply
    906.08x = 1,243.72 × 805.64
  4. Step 4: Simplify right side
    906.08x = 1,001,990.58
  5. Step 5: Solve for x
    x = 1,001,990.58/906.08
  6. Step 6: Final answer
    x = 1,105.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.