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Finding the Fourth Proportional to 708.26, 1,061.20 and 553.54

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Solution

The fourth proportional to 708.26, 1,061.20 and 553.54 is: 829.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.26 : 1,061.20 = 553.54 : x
  2. Step 2: Convert to fraction form
    708.26/1,061.20 = 553.54/x
  3. Step 3: Cross multiply
    708.26x = 1,061.20 × 553.54
  4. Step 4: Simplify right side
    708.26x = 587,416.65
  5. Step 5: Solve for x
    x = 587,416.65/708.26
  6. Step 6: Final answer
    x = 829.38

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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.