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Finding the Fourth Proportional to 479.79, 718.81 and 235.78

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Solution

The fourth proportional to 479.79, 718.81 and 235.78 is: 353.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.79 : 718.81 = 235.78 : x
  2. Step 2: Convert to fraction form
    479.79/718.81 = 235.78/x
  3. Step 3: Cross multiply
    479.79x = 718.81 × 235.78
  4. Step 4: Simplify right side
    479.79x = 169,478.64
  5. Step 5: Solve for x
    x = 169,478.64/479.79
  6. Step 6: Final answer
    x = 353.24

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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.