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Finding the Fourth Proportional to 565.86, 778.92 and 491.88

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Solution

The fourth proportional to 565.86, 778.92 and 491.88 is: 677.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.86 : 778.92 = 491.88 : x
  2. Step 2: Convert to fraction form
    565.86/778.92 = 491.88/x
  3. Step 3: Cross multiply
    565.86x = 778.92 × 491.88
  4. Step 4: Simplify right side
    565.86x = 383,135.17
  5. Step 5: Solve for x
    x = 383,135.17/565.86
  6. Step 6: Final answer
    x = 677.08

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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.