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Finding the Fourth Proportional to 615.78, 849.78 and 336.02

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Solution

The fourth proportional to 615.78, 849.78 and 336.02 is: 463.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.78 : 849.78 = 336.02 : x
  2. Step 2: Convert to fraction form
    615.78/849.78 = 336.02/x
  3. Step 3: Cross multiply
    615.78x = 849.78 × 336.02
  4. Step 4: Simplify right side
    615.78x = 285,538.68
  5. Step 5: Solve for x
    x = 285,538.68/615.78
  6. Step 6: Final answer
    x = 463.70

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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.