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Finding the Fourth Proportional to 518.46, 777.64 and 148.29

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Solution

The fourth proportional to 518.46, 777.64 and 148.29 is: 222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.46 : 777.64 = 148.29 : x
  2. Step 2: Convert to fraction form
    518.46/777.64 = 148.29/x
  3. Step 3: Cross multiply
    518.46x = 777.64 × 148.29
  4. Step 4: Simplify right side
    518.46x = 115,315.86
  5. Step 5: Solve for x
    x = 115,315.86/518.46
  6. Step 6: Final answer
    x = 222.42

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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.