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Finding the Fourth Proportional to 479.99, 720.05 and 206.07

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Solution

The fourth proportional to 479.99, 720.05 and 206.07 is: 309.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.99 : 720.05 = 206.07 : x
  2. Step 2: Convert to fraction form
    479.99/720.05 = 206.07/x
  3. Step 3: Cross multiply
    479.99x = 720.05 × 206.07
  4. Step 4: Simplify right side
    479.99x = 148,379.67
  5. Step 5: Solve for x
    x = 148,379.67/479.99
  6. Step 6: Final answer
    x = 309.13

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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.