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Finding the Fourth Proportional to 574.61, 860.90 and 553.28

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Solution

The fourth proportional to 574.61, 860.90 and 553.28 is: 828.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.61 : 860.90 = 553.28 : x
  2. Step 2: Convert to fraction form
    574.61/860.90 = 553.28/x
  3. Step 3: Cross multiply
    574.61x = 860.90 × 553.28
  4. Step 4: Simplify right side
    574.61x = 476,311.68
  5. Step 5: Solve for x
    x = 476,311.68/574.61
  6. Step 6: Final answer
    x = 828.94

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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.