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Finding the Fourth Proportional to 493.80, 678.17 and 429.80

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Solution

The fourth proportional to 493.80, 678.17 and 429.80 is: 590.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.80 : 678.17 = 429.80 : x
  2. Step 2: Convert to fraction form
    493.80/678.17 = 429.80/x
  3. Step 3: Cross multiply
    493.80x = 678.17 × 429.80
  4. Step 4: Simplify right side
    493.80x = 291,477.47
  5. Step 5: Solve for x
    x = 291,477.47/493.80
  6. Step 6: Final answer
    x = 590.27

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.