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Finding the Fourth Proportional to 4,394.40, 6,591.60 and 4,221.60

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Solution

The fourth proportional to 4,394.40, 6,591.60 and 4,221.60 is: 6,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,394.40 : 6,591.60 = 4,221.60 : x
  2. Step 2: Convert to fraction form
    4,394.40/6,591.60 = 4,221.60/x
  3. Step 3: Cross multiply
    4,394.40x = 6,591.60 × 4,221.60
  4. Step 4: Simplify right side
    4,394.40x = 27,827,098.56
  5. Step 5: Solve for x
    x = 27,827,098.56/4,394.40
  6. Step 6: Final answer
    x = 6,332.40

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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.