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Finding the Fourth Proportional to 479.56, 717.08 and 342.18

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Solution

The fourth proportional to 479.56, 717.08 and 342.18 is: 511.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.56 : 717.08 = 342.18 : x
  2. Step 2: Convert to fraction form
    479.56/717.08 = 342.18/x
  3. Step 3: Cross multiply
    479.56x = 717.08 × 342.18
  4. Step 4: Simplify right side
    479.56x = 245,370.43
  5. Step 5: Solve for x
    x = 245,370.43/479.56
  6. Step 6: Final answer
    x = 511.66

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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.