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Finding the Fourth Proportional to 603.25, 831.72 and 514.55

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Solution

The fourth proportional to 603.25, 831.72 and 514.55 is: 709.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.25 : 831.72 = 514.55 : x
  2. Step 2: Convert to fraction form
    603.25/831.72 = 514.55/x
  3. Step 3: Cross multiply
    603.25x = 831.72 × 514.55
  4. Step 4: Simplify right side
    603.25x = 427,962.64
  5. Step 5: Solve for x
    x = 427,962.64/603.25
  6. Step 6: Final answer
    x = 709.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.