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Finding the Fourth Proportional to 1,659.57, 2,290.11 and 913.38

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Solution

The fourth proportional to 1,659.57, 2,290.11 and 913.38 is: 1,260.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.57 : 2,290.11 = 913.38 : x
  2. Step 2: Convert to fraction form
    1,659.57/2,290.11 = 913.38/x
  3. Step 3: Cross multiply
    1,659.57x = 2,290.11 × 913.38
  4. Step 4: Simplify right side
    1,659.57x = 2,091,740.67
  5. Step 5: Solve for x
    x = 2,091,740.67/1,659.57
  6. Step 6: Final answer
    x = 1,260.42

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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.