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Finding the Fourth Proportional to 5,269.60, 7,894.80 and 4,290.40

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Solution

The fourth proportional to 5,269.60, 7,894.80 and 4,290.40 is: 6,427.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,269.60 : 7,894.80 = 4,290.40 : x
  2. Step 2: Convert to fraction form
    5,269.60/7,894.80 = 4,290.40/x
  3. Step 3: Cross multiply
    5,269.60x = 7,894.80 × 4,290.40
  4. Step 4: Simplify right side
    5,269.60x = 33,871,849.92
  5. Step 5: Solve for x
    x = 33,871,849.92/5,269.60
  6. Step 6: Final answer
    x = 6,427.78

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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.