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Finding the Fourth Proportional to 615.86, 850.02 and 419.43

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Solution

The fourth proportional to 615.86, 850.02 and 419.43 is: 578.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.86 : 850.02 = 419.43 : x
  2. Step 2: Convert to fraction form
    615.86/850.02 = 419.43/x
  3. Step 3: Cross multiply
    615.86x = 850.02 × 419.43
  4. Step 4: Simplify right side
    615.86x = 356,523.89
  5. Step 5: Solve for x
    x = 356,523.89/615.86
  6. Step 6: Final answer
    x = 578.90

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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.