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Finding the Fourth Proportional to 5,278.77, 7,879.16 and 4,656.20

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Solution

The fourth proportional to 5,278.77, 7,879.16 and 4,656.20 is: 6,949.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.77 : 7,879.16 = 4,656.20 : x
  2. Step 2: Convert to fraction form
    5,278.77/7,879.16 = 4,656.20/x
  3. Step 3: Cross multiply
    5,278.77x = 7,879.16 × 4,656.20
  4. Step 4: Simplify right side
    5,278.77x = 36,686,917.04
  5. Step 5: Solve for x
    x = 36,686,917.04/5,278.77
  6. Step 6: Final answer
    x = 6,949.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.