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Finding the Fourth Proportional to 4,230.86, 6,347.79 and 1,890.65

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Solution

The fourth proportional to 4,230.86, 6,347.79 and 1,890.65 is: 2,836.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,230.86 : 6,347.79 = 1,890.65 : x
  2. Step 2: Convert to fraction form
    4,230.86/6,347.79 = 1,890.65/x
  3. Step 3: Cross multiply
    4,230.86x = 6,347.79 × 1,890.65
  4. Step 4: Simplify right side
    4,230.86x = 12,001,449.16
  5. Step 5: Solve for x
    x = 12,001,449.16/4,230.86
  6. Step 6: Final answer
    x = 2,836.65

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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.