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Finding the Fourth Proportional to 1,661.40, 2,292.58 and 1,605.48

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Solution

The fourth proportional to 1,661.40, 2,292.58 and 1,605.48 is: 2,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.40 : 2,292.58 = 1,605.48 : x
  2. Step 2: Convert to fraction form
    1,661.40/2,292.58 = 1,605.48/x
  3. Step 3: Cross multiply
    1,661.40x = 2,292.58 × 1,605.48
  4. Step 4: Simplify right side
    1,661.40x = 3,680,691.34
  5. Step 5: Solve for x
    x = 3,680,691.34/1,661.40
  6. Step 6: Final answer
    x = 2,215.42

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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.