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Finding the Fourth Proportional to 906.23, 1,357.96 and 646.69

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Solution

The fourth proportional to 906.23, 1,357.96 and 646.69 is: 969.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.23 : 1,357.96 = 646.69 : x
  2. Step 2: Convert to fraction form
    906.23/1,357.96 = 646.69/x
  3. Step 3: Cross multiply
    906.23x = 1,357.96 × 646.69
  4. Step 4: Simplify right side
    906.23x = 878,179.15
  5. Step 5: Solve for x
    x = 878,179.15/906.23
  6. Step 6: Final answer
    x = 969.05

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.