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Finding the Fourth Proportional to 612.99, 918.08 and 368.97

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Solution

The fourth proportional to 612.99, 918.08 and 368.97 is: 552.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.99 : 918.08 = 368.97 : x
  2. Step 2: Convert to fraction form
    612.99/918.08 = 368.97/x
  3. Step 3: Cross multiply
    612.99x = 918.08 × 368.97
  4. Step 4: Simplify right side
    612.99x = 338,742.13
  5. Step 5: Solve for x
    x = 338,742.13/612.99
  6. Step 6: Final answer
    x = 552.61

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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.