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Finding the Fourth Proportional to 519.60, 717.48 and 345.72

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Solution

The fourth proportional to 519.60, 717.48 and 345.72 is: 477.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.60 : 717.48 = 345.72 : x
  2. Step 2: Convert to fraction form
    519.60/717.48 = 345.72/x
  3. Step 3: Cross multiply
    519.60x = 717.48 × 345.72
  4. Step 4: Simplify right side
    519.60x = 248,047.19
  5. Step 5: Solve for x
    x = 248,047.19/519.60
  6. Step 6: Final answer
    x = 477.38

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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.