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Finding the Fourth Proportional to 478.96, 718.53 and 205.05

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Solution

The fourth proportional to 478.96, 718.53 and 205.05 is: 307.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.96 : 718.53 = 205.05 : x
  2. Step 2: Convert to fraction form
    478.96/718.53 = 205.05/x
  3. Step 3: Cross multiply
    478.96x = 718.53 × 205.05
  4. Step 4: Simplify right side
    478.96x = 147,334.58
  5. Step 5: Solve for x
    x = 147,334.58/478.96
  6. Step 6: Final answer
    x = 307.61

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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.