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Finding the Fourth Proportional to 4,947.86, 7,420.01 and 1,660.20

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Solution

The fourth proportional to 4,947.86, 7,420.01 and 1,660.20 is: 2,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,947.86 : 7,420.01 = 1,660.20 : x
  2. Step 2: Convert to fraction form
    4,947.86/7,420.01 = 1,660.20/x
  3. Step 3: Cross multiply
    4,947.86x = 7,420.01 × 1,660.20
  4. Step 4: Simplify right side
    4,947.86x = 12,318,664.48
  5. Step 5: Solve for x
    x = 12,318,664.48/4,947.86
  6. Step 6: Final answer
    x = 2,489.70

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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.