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Finding the Fourth Proportional to 4,326.87, 6,490.22 and 1,405.19

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Solution

The fourth proportional to 4,326.87, 6,490.22 and 1,405.19 is: 2,107.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,326.87 : 6,490.22 = 1,405.19 : x
  2. Step 2: Convert to fraction form
    4,326.87/6,490.22 = 1,405.19/x
  3. Step 3: Cross multiply
    4,326.87x = 6,490.22 × 1,405.19
  4. Step 4: Simplify right side
    4,326.87x = 9,119,952.76
  5. Step 5: Solve for x
    x = 9,119,952.76/4,326.87
  6. Step 6: Final answer
    x = 2,107.75

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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.