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Finding the Fourth Proportional to 612.12, 918.18 and 368.58

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Solution

The fourth proportional to 612.12, 918.18 and 368.58 is: 552.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.12 : 918.18 = 368.58 : x
  2. Step 2: Convert to fraction form
    612.12/918.18 = 368.58/x
  3. Step 3: Cross multiply
    612.12x = 918.18 × 368.58
  4. Step 4: Simplify right side
    612.12x = 338,426.23
  5. Step 5: Solve for x
    x = 338,426.23/612.12
  6. Step 6: Final answer
    x = 552.87

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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.