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Finding the Fourth Proportional to 479.12, 718.81 and 205.00

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Solution

The fourth proportional to 479.12, 718.81 and 205.00 is: 307.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.12 : 718.81 = 205.00 : x
  2. Step 2: Convert to fraction form
    479.12/718.81 = 205.00/x
  3. Step 3: Cross multiply
    479.12x = 718.81 × 205.00
  4. Step 4: Simplify right side
    479.12x = 147,353.74
  5. Step 5: Solve for x
    x = 147,353.74/479.12
  6. Step 6: Final answer
    x = 307.55

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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.