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Finding the Fourth Proportional to 2,805.57, 4,208.36 and 1,658.61

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Solution

The fourth proportional to 2,805.57, 4,208.36 and 1,658.61 is: 2,487.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.57 : 4,208.36 = 1,658.61 : x
  2. Step 2: Convert to fraction form
    2,805.57/4,208.36 = 1,658.61/x
  3. Step 3: Cross multiply
    2,805.57x = 4,208.36 × 1,658.61
  4. Step 4: Simplify right side
    2,805.57x = 6,980,019.69
  5. Step 5: Solve for x
    x = 6,980,019.69/2,805.57
  6. Step 6: Final answer
    x = 2,487.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.