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Finding the Fourth Proportional to 612.47, 918.71 and 179.63

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Solution

The fourth proportional to 612.47, 918.71 and 179.63 is: 269.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.47 : 918.71 = 179.63 : x
  2. Step 2: Convert to fraction form
    612.47/918.71 = 179.63/x
  3. Step 3: Cross multiply
    612.47x = 918.71 × 179.63
  4. Step 4: Simplify right side
    612.47x = 165,027.88
  5. Step 5: Solve for x
    x = 165,027.88/612.47
  6. Step 6: Final answer
    x = 269.45

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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.