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Finding the Fourth Proportional to 615.35, 849.39 and 402.67

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Solution

The fourth proportional to 615.35, 849.39 and 402.67 is: 555.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.35 : 849.39 = 402.67 : x
  2. Step 2: Convert to fraction form
    615.35/849.39 = 402.67/x
  3. Step 3: Cross multiply
    615.35x = 849.39 × 402.67
  4. Step 4: Simplify right side
    615.35x = 342,023.42
  5. Step 5: Solve for x
    x = 342,023.42/615.35
  6. Step 6: Final answer
    x = 555.82

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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.