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Finding the Fourth Proportional to 1,605.44, 2,215.44 and 906.88

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Solution

The fourth proportional to 1,605.44, 2,215.44 and 906.88 is: 1,251.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.44 : 2,215.44 = 906.88 : x
  2. Step 2: Convert to fraction form
    1,605.44/2,215.44 = 906.88/x
  3. Step 3: Cross multiply
    1,605.44x = 2,215.44 × 906.88
  4. Step 4: Simplify right side
    1,605.44x = 2,009,138.23
  5. Step 5: Solve for x
    x = 2,009,138.23/1,605.44
  6. Step 6: Final answer
    x = 1,251.46

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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.