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Finding the Fourth Proportional to 664.98, 998.79 and 503.58

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Solution

The fourth proportional to 664.98, 998.79 and 503.58 is: 756.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.98 : 998.79 = 503.58 : x
  2. Step 2: Convert to fraction form
    664.98/998.79 = 503.58/x
  3. Step 3: Cross multiply
    664.98x = 998.79 × 503.58
  4. Step 4: Simplify right side
    664.98x = 502,970.67
  5. Step 5: Solve for x
    x = 502,970.67/664.98
  6. Step 6: Final answer
    x = 756.37

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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.