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Finding the Fourth Proportional to 1,605.80, 2,215.14 and 1,107.56

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Solution

The fourth proportional to 1,605.80, 2,215.14 and 1,107.56 is: 1,527.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.80 : 2,215.14 = 1,107.56 : x
  2. Step 2: Convert to fraction form
    1,605.80/2,215.14 = 1,107.56/x
  3. Step 3: Cross multiply
    1,605.80x = 2,215.14 × 1,107.56
  4. Step 4: Simplify right side
    1,605.80x = 2,453,400.46
  5. Step 5: Solve for x
    x = 2,453,400.46/1,605.80
  6. Step 6: Final answer
    x = 1,527.84

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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.