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Finding the Fourth Proportional to 6,290, 9,429.60 and 2,391.68

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Solution

The fourth proportional to 6,290, 9,429.60 and 2,391.68 is: 3,585.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,290 : 9,429.60 = 2,391.68 : x
  2. Step 2: Convert to fraction form
    6,290/9,429.60 = 2,391.68/x
  3. Step 3: Cross multiply
    6,290x = 9,429.60 × 2,391.68
  4. Step 4: Simplify right side
    6,290x = 22,552,585.73
  5. Step 5: Solve for x
    x = 22,552,585.73/6,290
  6. Step 6: Final answer
    x = 3,585.47

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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.