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Finding the Fourth Proportional to 906.10, 1,248.96 and 657.08

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Solution

The fourth proportional to 906.10, 1,248.96 and 657.08 is: 905.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.10 : 1,248.96 = 657.08 : x
  2. Step 2: Convert to fraction form
    906.10/1,248.96 = 657.08/x
  3. Step 3: Cross multiply
    906.10x = 1,248.96 × 657.08
  4. Step 4: Simplify right side
    906.10x = 820,666.64
  5. Step 5: Solve for x
    x = 820,666.64/906.10
  6. Step 6: Final answer
    x = 905.71

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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.