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Finding the Fourth Proportional to 578.15, 798.68 and 500.39

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Solution

The fourth proportional to 578.15, 798.68 and 500.39 is: 691.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.15 : 798.68 = 500.39 : x
  2. Step 2: Convert to fraction form
    578.15/798.68 = 500.39/x
  3. Step 3: Cross multiply
    578.15x = 798.68 × 500.39
  4. Step 4: Simplify right side
    578.15x = 399,651.49
  5. Step 5: Solve for x
    x = 399,651.49/578.15
  6. Step 6: Final answer
    x = 691.26

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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.