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Finding the Fourth Proportional to 612.42, 918.17 and 368.88

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Solution

The fourth proportional to 612.42, 918.17 and 368.88 is: 553.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.42 : 918.17 = 368.88 : x
  2. Step 2: Convert to fraction form
    612.42/918.17 = 368.88/x
  3. Step 3: Cross multiply
    612.42x = 918.17 × 368.88
  4. Step 4: Simplify right side
    612.42x = 338,694.55
  5. Step 5: Solve for x
    x = 338,694.55/612.42
  6. Step 6: Final answer
    x = 553.04

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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.