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Finding the Fourth Proportional to 1,212.73, 1,825.26 and 906.21

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Solution

The fourth proportional to 1,212.73, 1,825.26 and 906.21 is: 1,363.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.73 : 1,825.26 = 906.21 : x
  2. Step 2: Convert to fraction form
    1,212.73/1,825.26 = 906.21/x
  3. Step 3: Cross multiply
    1,212.73x = 1,825.26 × 906.21
  4. Step 4: Simplify right side
    1,212.73x = 1,654,068.86
  5. Step 5: Solve for x
    x = 1,654,068.86/1,212.73
  6. Step 6: Final answer
    x = 1,363.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.