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Finding the Fourth Proportional to 2,900.92, 4,351.42 and 709.70

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Solution

The fourth proportional to 2,900.92, 4,351.42 and 709.70 is: 1,064.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.92 : 4,351.42 = 709.70 : x
  2. Step 2: Convert to fraction form
    2,900.92/4,351.42 = 709.70/x
  3. Step 3: Cross multiply
    2,900.92x = 4,351.42 × 709.70
  4. Step 4: Simplify right side
    2,900.92x = 3,088,202.77
  5. Step 5: Solve for x
    x = 3,088,202.77/2,900.92
  6. Step 6: Final answer
    x = 1,064.56

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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.