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Finding the Fourth Proportional to 609.55, 917.03 and 571.21

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Solution

The fourth proportional to 609.55, 917.03 and 571.21 is: 859.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.55 : 917.03 = 571.21 : x
  2. Step 2: Convert to fraction form
    609.55/917.03 = 571.21/x
  3. Step 3: Cross multiply
    609.55x = 917.03 × 571.21
  4. Step 4: Simplify right side
    609.55x = 523,816.71
  5. Step 5: Solve for x
    x = 523,816.71/609.55
  6. Step 6: Final answer
    x = 859.35

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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.