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Finding the Fourth Proportional to 2,900.79, 4,351.17 and 709.53

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Solution

The fourth proportional to 2,900.79, 4,351.17 and 709.53 is: 1,064.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.79 : 4,351.17 = 709.53 : x
  2. Step 2: Convert to fraction form
    2,900.79/4,351.17 = 709.53/x
  3. Step 3: Cross multiply
    2,900.79x = 4,351.17 × 709.53
  4. Step 4: Simplify right side
    2,900.79x = 3,087,285.65
  5. Step 5: Solve for x
    x = 3,087,285.65/2,900.79
  6. Step 6: Final answer
    x = 1,064.29

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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.