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Finding the Fourth Proportional to 619.82, 929.89 and 437.57

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Solution

The fourth proportional to 619.82, 929.89 and 437.57 is: 656.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.82 : 929.89 = 437.57 : x
  2. Step 2: Convert to fraction form
    619.82/929.89 = 437.57/x
  3. Step 3: Cross multiply
    619.82x = 929.89 × 437.57
  4. Step 4: Simplify right side
    619.82x = 406,890.87
  5. Step 5: Solve for x
    x = 406,890.87/619.82
  6. Step 6: Final answer
    x = 656.47

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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.