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Finding the Fourth Proportional to 586.42, 879.64 and 550.78

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Solution

The fourth proportional to 586.42, 879.64 and 550.78 is: 826.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.42 : 879.64 = 550.78 : x
  2. Step 2: Convert to fraction form
    586.42/879.64 = 550.78/x
  3. Step 3: Cross multiply
    586.42x = 879.64 × 550.78
  4. Step 4: Simplify right side
    586.42x = 484,488.12
  5. Step 5: Solve for x
    x = 484,488.12/586.42
  6. Step 6: Final answer
    x = 826.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.