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Finding the Fourth Proportional to 612.51, 917.19 and 338.29

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Solution

The fourth proportional to 612.51, 917.19 and 338.29 is: 506.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.51 : 917.19 = 338.29 : x
  2. Step 2: Convert to fraction form
    612.51/917.19 = 338.29/x
  3. Step 3: Cross multiply
    612.51x = 917.19 × 338.29
  4. Step 4: Simplify right side
    612.51x = 310,276.21
  5. Step 5: Solve for x
    x = 310,276.21/612.51
  6. Step 6: Final answer
    x = 506.57

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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.