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Finding the Fourth Proportional to 615.05, 849.14 and 428.46

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Solution

The fourth proportional to 615.05, 849.14 and 428.46 is: 591.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.05 : 849.14 = 428.46 : x
  2. Step 2: Convert to fraction form
    615.05/849.14 = 428.46/x
  3. Step 3: Cross multiply
    615.05x = 849.14 × 428.46
  4. Step 4: Simplify right side
    615.05x = 363,822.52
  5. Step 5: Solve for x
    x = 363,822.52/615.05
  6. Step 6: Final answer
    x = 591.53

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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.