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Finding the Fourth Proportional to 4,326.86, 6,490.29 and 1,405.39

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Solution

The fourth proportional to 4,326.86, 6,490.29 and 1,405.39 is: 2,108.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,326.86 : 6,490.29 = 1,405.39 : x
  2. Step 2: Convert to fraction form
    4,326.86/6,490.29 = 1,405.39/x
  3. Step 3: Cross multiply
    4,326.86x = 6,490.29 × 1,405.39
  4. Step 4: Simplify right side
    4,326.86x = 9,121,388.66
  5. Step 5: Solve for x
    x = 9,121,388.66/4,326.86
  6. Step 6: Final answer
    x = 2,108.09

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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.