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Finding the Fourth Proportional to 5,285.76, 7,923.38 and 2,645.21

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Solution

The fourth proportional to 5,285.76, 7,923.38 and 2,645.21 is: 3,965.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.76 : 7,923.38 = 2,645.21 : x
  2. Step 2: Convert to fraction form
    5,285.76/7,923.38 = 2,645.21/x
  3. Step 3: Cross multiply
    5,285.76x = 7,923.38 × 2,645.21
  4. Step 4: Simplify right side
    5,285.76x = 20,958,967.88
  5. Step 5: Solve for x
    x = 20,958,967.88/5,285.76
  6. Step 6: Final answer
    x = 3,965.17

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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.