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Finding the Fourth Proportional to 612.45, 918.45 and 179.46

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Solution

The fourth proportional to 612.45, 918.45 and 179.46 is: 269.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.45 : 918.45 = 179.46 : x
  2. Step 2: Convert to fraction form
    612.45/918.45 = 179.46/x
  3. Step 3: Cross multiply
    612.45x = 918.45 × 179.46
  4. Step 4: Simplify right side
    612.45x = 164,825.04
  5. Step 5: Solve for x
    x = 164,825.04/612.45
  6. Step 6: Final answer
    x = 269.12

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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.