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Finding the Fourth Proportional to 4,262.86, 6,388.90 and 1,920.37

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Solution

The fourth proportional to 4,262.86, 6,388.90 and 1,920.37 is: 2,878.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,262.86 : 6,388.90 = 1,920.37 : x
  2. Step 2: Convert to fraction form
    4,262.86/6,388.90 = 1,920.37/x
  3. Step 3: Cross multiply
    4,262.86x = 6,388.90 × 1,920.37
  4. Step 4: Simplify right side
    4,262.86x = 12,269,051.89
  5. Step 5: Solve for x
    x = 12,269,051.89/4,262.86
  6. Step 6: Final answer
    x = 2,878.13

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1.5x scale

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.