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Finding the Fourth Proportional to 519.90, 717.03 and 354.12

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Solution

The fourth proportional to 519.90, 717.03 and 354.12 is: 488.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.90 : 717.03 = 354.12 : x
  2. Step 2: Convert to fraction form
    519.90/717.03 = 354.12/x
  3. Step 3: Cross multiply
    519.90x = 717.03 × 354.12
  4. Step 4: Simplify right side
    519.90x = 253,914.66
  5. Step 5: Solve for x
    x = 253,914.66/519.90
  6. Step 6: Final answer
    x = 488.39

Related Problems

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Double scale
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1.5x scale

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.