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Finding the Fourth Proportional to 558.55, 769.68 and 519.63

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Solution

The fourth proportional to 558.55, 769.68 and 519.63 is: 716.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.55 : 769.68 = 519.63 : x
  2. Step 2: Convert to fraction form
    558.55/769.68 = 519.63/x
  3. Step 3: Cross multiply
    558.55x = 769.68 × 519.63
  4. Step 4: Simplify right side
    558.55x = 399,948.82
  5. Step 5: Solve for x
    x = 399,948.82/558.55
  6. Step 6: Final answer
    x = 716.05

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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.