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Finding the Fourth Proportional to 6,479.90, 9,715.05 and 2,779.10

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Solution

The fourth proportional to 6,479.90, 9,715.05 and 2,779.10 is: 4,166.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.90 : 9,715.05 = 2,779.10 : x
  2. Step 2: Convert to fraction form
    6,479.90/9,715.05 = 2,779.10/x
  3. Step 3: Cross multiply
    6,479.90x = 9,715.05 × 2,779.10
  4. Step 4: Simplify right side
    6,479.90x = 26,999,095.46
  5. Step 5: Solve for x
    x = 26,999,095.46/6,479.90
  6. Step 6: Final answer
    x = 4,166.59

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1.5x scale

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.