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Finding the Fourth Proportional to 404.99, 607.79 and 307.79

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Solution

The fourth proportional to 404.99, 607.79 and 307.79 is: 461.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.99 : 607.79 = 307.79 : x
  2. Step 2: Convert to fraction form
    404.99/607.79 = 307.79/x
  3. Step 3: Cross multiply
    404.99x = 607.79 × 307.79
  4. Step 4: Simplify right side
    404.99x = 187,071.68
  5. Step 5: Solve for x
    x = 187,071.68/404.99
  6. Step 6: Final answer
    x = 461.92

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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.