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Finding the Fourth Proportional to 558.65, 774.20 and 550.82

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Solution

The fourth proportional to 558.65, 774.20 and 550.82 is: 763.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.65 : 774.20 = 550.82 : x
  2. Step 2: Convert to fraction form
    558.65/774.20 = 550.82/x
  3. Step 3: Cross multiply
    558.65x = 774.20 × 550.82
  4. Step 4: Simplify right side
    558.65x = 426,444.84
  5. Step 5: Solve for x
    x = 426,444.84/558.65
  6. Step 6: Final answer
    x = 763.35

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.