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Finding the Fourth Proportional to 6,378.77, 8,802.80 and 3,507.61

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Solution

The fourth proportional to 6,378.77, 8,802.80 and 3,507.61 is: 4,840.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,378.77 : 8,802.80 = 3,507.61 : x
  2. Step 2: Convert to fraction form
    6,378.77/8,802.80 = 3,507.61/x
  3. Step 3: Cross multiply
    6,378.77x = 8,802.80 × 3,507.61
  4. Step 4: Simplify right side
    6,378.77x = 30,876,771.77
  5. Step 5: Solve for x
    x = 30,876,771.77/6,378.77
  6. Step 6: Final answer
    x = 4,840.56

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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.