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Finding the Fourth Proportional to 619.17, 852.57 and 520.71

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Solution

The fourth proportional to 619.17, 852.57 and 520.71 is: 716.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.17 : 852.57 = 520.71 : x
  2. Step 2: Convert to fraction form
    619.17/852.57 = 520.71/x
  3. Step 3: Cross multiply
    619.17x = 852.57 × 520.71
  4. Step 4: Simplify right side
    619.17x = 443,941.72
  5. Step 5: Solve for x
    x = 443,941.72/619.17
  6. Step 6: Final answer
    x = 716.99

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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.