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Finding the Fourth Proportional to 519.18, 716.58 and 353.40

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Solution

The fourth proportional to 519.18, 716.58 and 353.40 is: 487.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.18 : 716.58 = 353.40 : x
  2. Step 2: Convert to fraction form
    519.18/716.58 = 353.40/x
  3. Step 3: Cross multiply
    519.18x = 716.58 × 353.40
  4. Step 4: Simplify right side
    519.18x = 253,239.37
  5. Step 5: Solve for x
    x = 253,239.37/519.18
  6. Step 6: Final answer
    x = 487.77

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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.