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Finding the Fourth Proportional to 3,867.86, 5,345.25 and 3,435.86

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Solution

The fourth proportional to 3,867.86, 5,345.25 and 3,435.86 is: 4,748.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,867.86 : 5,345.25 = 3,435.86 : x
  2. Step 2: Convert to fraction form
    3,867.86/5,345.25 = 3,435.86/x
  3. Step 3: Cross multiply
    3,867.86x = 5,345.25 × 3,435.86
  4. Step 4: Simplify right side
    3,867.86x = 18,365,530.67
  5. Step 5: Solve for x
    x = 18,365,530.67/3,867.86
  6. Step 6: Final answer
    x = 4,748.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.