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Finding the Fourth Proportional to 519.89, 716.57 and 431.50

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Solution

The fourth proportional to 519.89, 716.57 and 431.50 is: 594.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.89 : 716.57 = 431.50 : x
  2. Step 2: Convert to fraction form
    519.89/716.57 = 431.50/x
  3. Step 3: Cross multiply
    519.89x = 716.57 × 431.50
  4. Step 4: Simplify right side
    519.89x = 309,199.96
  5. Step 5: Solve for x
    x = 309,199.96/519.89
  6. Step 6: Final answer
    x = 594.74

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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.