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Finding the Fourth Proportional to 4,672.86, 7,009.30 and 1,385.96

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Solution

The fourth proportional to 4,672.86, 7,009.30 and 1,385.96 is: 2,078.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,672.86 : 7,009.30 = 1,385.96 : x
  2. Step 2: Convert to fraction form
    4,672.86/7,009.30 = 1,385.96/x
  3. Step 3: Cross multiply
    4,672.86x = 7,009.30 × 1,385.96
  4. Step 4: Simplify right side
    4,672.86x = 9,714,609.43
  5. Step 5: Solve for x
    x = 9,714,609.43/4,672.86
  6. Step 6: Final answer
    x = 2,078.94

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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.