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Finding the Fourth Proportional to 5,579.64, 7,698.54 and 3,221.79

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Solution

The fourth proportional to 5,579.64, 7,698.54 and 3,221.79 is: 4,445.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,579.64 : 7,698.54 = 3,221.79 : x
  2. Step 2: Convert to fraction form
    5,579.64/7,698.54 = 3,221.79/x
  3. Step 3: Cross multiply
    5,579.64x = 7,698.54 × 3,221.79
  4. Step 4: Simplify right side
    5,579.64x = 24,803,079.19
  5. Step 5: Solve for x
    x = 24,803,079.19/5,579.64
  6. Step 6: Final answer
    x = 4,445.28

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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.