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Finding the Fourth Proportional to 6,478.95, 9,711.06 and 2,779.29

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Solution

The fourth proportional to 6,478.95, 9,711.06 and 2,779.29 is: 4,165.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,478.95 : 9,711.06 = 2,779.29 : x
  2. Step 2: Convert to fraction form
    6,478.95/9,711.06 = 2,779.29/x
  3. Step 3: Cross multiply
    6,478.95x = 9,711.06 × 2,779.29
  4. Step 4: Simplify right side
    6,478.95x = 26,989,851.95
  5. Step 5: Solve for x
    x = 26,989,851.95/6,478.95
  6. Step 6: Final answer
    x = 4,165.78

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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.