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Finding the Fourth Proportional to 619.99, 929.81 and 404.71

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Solution

The fourth proportional to 619.99, 929.81 and 404.71 is: 606.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.99 : 929.81 = 404.71 : x
  2. Step 2: Convert to fraction form
    619.99/929.81 = 404.71/x
  3. Step 3: Cross multiply
    619.99x = 929.81 × 404.71
  4. Step 4: Simplify right side
    619.99x = 376,301.38
  5. Step 5: Solve for x
    x = 376,301.38/619.99
  6. Step 6: Final answer
    x = 606.95

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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.