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Finding the Fourth Proportional to 518.19, 777.32 and 189.31

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Solution

The fourth proportional to 518.19, 777.32 and 189.31 is: 283.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.19 : 777.32 = 189.31 : x
  2. Step 2: Convert to fraction form
    518.19/777.32 = 189.31/x
  3. Step 3: Cross multiply
    518.19x = 777.32 × 189.31
  4. Step 4: Simplify right side
    518.19x = 147,154.45
  5. Step 5: Solve for x
    x = 147,154.45/518.19
  6. Step 6: Final answer
    x = 283.98

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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.