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Finding the Fourth Proportional to 606.68, 909.38 and 553.22

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Solution

The fourth proportional to 606.68, 909.38 and 553.22 is: 829.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.68 : 909.38 = 553.22 : x
  2. Step 2: Convert to fraction form
    606.68/909.38 = 553.22/x
  3. Step 3: Cross multiply
    606.68x = 909.38 × 553.22
  4. Step 4: Simplify right side
    606.68x = 503,087.20
  5. Step 5: Solve for x
    x = 503,087.20/606.68
  6. Step 6: Final answer
    x = 829.25

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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.