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Finding the Fourth Proportional to 349.59, 519.95 and 342.30

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Solution

The fourth proportional to 349.59, 519.95 and 342.30 is: 509.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.59 : 519.95 = 342.30 : x
  2. Step 2: Convert to fraction form
    349.59/519.95 = 342.30/x
  3. Step 3: Cross multiply
    349.59x = 519.95 × 342.30
  4. Step 4: Simplify right side
    349.59x = 177,978.89
  5. Step 5: Solve for x
    x = 177,978.89/349.59
  6. Step 6: Final answer
    x = 509.11

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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.