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Finding the Fourth Proportional to 613.51, 918.69 and 339.29

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Solution

The fourth proportional to 613.51, 918.69 and 339.29 is: 508.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.51 : 918.69 = 339.29 : x
  2. Step 2: Convert to fraction form
    613.51/918.69 = 339.29/x
  3. Step 3: Cross multiply
    613.51x = 918.69 × 339.29
  4. Step 4: Simplify right side
    613.51x = 311,702.33
  5. Step 5: Solve for x
    x = 311,702.33/613.51
  6. Step 6: Final answer
    x = 508.06

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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.