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Finding the Fourth Proportional to 578.83, 797.62 and 491.35

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Solution

The fourth proportional to 578.83, 797.62 and 491.35 is: 677.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.83 : 797.62 = 491.35 : x
  2. Step 2: Convert to fraction form
    578.83/797.62 = 491.35/x
  3. Step 3: Cross multiply
    578.83x = 797.62 × 491.35
  4. Step 4: Simplify right side
    578.83x = 391,910.59
  5. Step 5: Solve for x
    x = 391,910.59/578.83
  6. Step 6: Final answer
    x = 677.07

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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.