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Finding the Fourth Proportional to 479.99, 720.10 and 155.36

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Solution

The fourth proportional to 479.99, 720.10 and 155.36 is: 233.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.99 : 720.10 = 155.36 : x
  2. Step 2: Convert to fraction form
    479.99/720.10 = 155.36/x
  3. Step 3: Cross multiply
    479.99x = 720.10 × 155.36
  4. Step 4: Simplify right side
    479.99x = 111,870.90
  5. Step 5: Solve for x
    x = 111,870.90/479.99
  6. Step 6: Final answer
    x = 233.07

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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.