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Finding the Fourth Proportional to 603.61, 831.49 and 514.80

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Solution

The fourth proportional to 603.61, 831.49 and 514.80 is: 709.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.61 : 831.49 = 514.80 : x
  2. Step 2: Convert to fraction form
    603.61/831.49 = 514.80/x
  3. Step 3: Cross multiply
    603.61x = 831.49 × 514.80
  4. Step 4: Simplify right side
    603.61x = 428,051.05
  5. Step 5: Solve for x
    x = 428,051.05/603.61
  6. Step 6: Final answer
    x = 709.15

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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.