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Finding the Fourth Proportional to 4,672.78, 7,009.85 and 1,385.44

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Solution

The fourth proportional to 4,672.78, 7,009.85 and 1,385.44 is: 2,078.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,672.78 : 7,009.85 = 1,385.44 : x
  2. Step 2: Convert to fraction form
    4,672.78/7,009.85 = 1,385.44/x
  3. Step 3: Cross multiply
    4,672.78x = 7,009.85 × 1,385.44
  4. Step 4: Simplify right side
    4,672.78x = 9,711,726.58
  5. Step 5: Solve for x
    x = 9,711,726.58/4,672.78
  6. Step 6: Final answer
    x = 2,078.36

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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.