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Finding the Fourth Proportional to 385.69, 575.55 and 344.67

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Solution

The fourth proportional to 385.69, 575.55 and 344.67 is: 514.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.69 : 575.55 = 344.67 : x
  2. Step 2: Convert to fraction form
    385.69/575.55 = 344.67/x
  3. Step 3: Cross multiply
    385.69x = 575.55 × 344.67
  4. Step 4: Simplify right side
    385.69x = 198,374.82
  5. Step 5: Solve for x
    x = 198,374.82/385.69
  6. Step 6: Final answer
    x = 514.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.