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Finding the Fourth Proportional to 519.60, 699.30 and 519.60

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Solution

The fourth proportional to 519.60, 699.30 and 519.60 is: 699.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.60 : 699.30 = 519.60 : x
  2. Step 2: Convert to fraction form
    519.60/699.30 = 519.60/x
  3. Step 3: Cross multiply
    519.60x = 699.30 × 519.60
  4. Step 4: Simplify right side
    519.60x = 363,356.28
  5. Step 5: Solve for x
    x = 363,356.28/519.60
  6. Step 6: Final answer
    x = 699.30

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.