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Finding the Fourth Proportional to 4,777.86, 7,162.51 and 1,855.47

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Solution

The fourth proportional to 4,777.86, 7,162.51 and 1,855.47 is: 2,781.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,777.86 : 7,162.51 = 1,855.47 : x
  2. Step 2: Convert to fraction form
    4,777.86/7,162.51 = 1,855.47/x
  3. Step 3: Cross multiply
    4,777.86x = 7,162.51 × 1,855.47
  4. Step 4: Simplify right side
    4,777.86x = 13,289,822.43
  5. Step 5: Solve for x
    x = 13,289,822.43/4,777.86
  6. Step 6: Final answer
    x = 2,781.54

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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.