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Finding the Fourth Proportional to 4,220.60, 5,921.80 and 4,220.60

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Solution

The fourth proportional to 4,220.60, 5,921.80 and 4,220.60 is: 5,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,220.60 : 5,921.80 = 4,220.60 : x
  2. Step 2: Convert to fraction form
    4,220.60/5,921.80 = 4,220.60/x
  3. Step 3: Cross multiply
    4,220.60x = 5,921.80 × 4,220.60
  4. Step 4: Simplify right side
    4,220.60x = 24,993,549.08
  5. Step 5: Solve for x
    x = 24,993,549.08/4,220.60
  6. Step 6: Final answer
    x = 5,921.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.