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Finding the Fourth Proportional to 4,979.76, 7,471.80 and 2,381.01

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Solution

The fourth proportional to 4,979.76, 7,471.80 and 2,381.01 is: 3,572.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.76 : 7,471.80 = 2,381.01 : x
  2. Step 2: Convert to fraction form
    4,979.76/7,471.80 = 2,381.01/x
  3. Step 3: Cross multiply
    4,979.76x = 7,471.80 × 2,381.01
  4. Step 4: Simplify right side
    4,979.76x = 17,790,430.52
  5. Step 5: Solve for x
    x = 17,790,430.52/4,979.76
  6. Step 6: Final answer
    x = 3,572.55

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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.