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Finding the Fourth Proportional to 612.67, 918.37 and 247.30

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Solution

The fourth proportional to 612.67, 918.37 and 247.30 is: 370.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.67 : 918.37 = 247.30 : x
  2. Step 2: Convert to fraction form
    612.67/918.37 = 247.30/x
  3. Step 3: Cross multiply
    612.67x = 918.37 × 247.30
  4. Step 4: Simplify right side
    612.67x = 227,112.90
  5. Step 5: Solve for x
    x = 227,112.90/612.67
  6. Step 6: Final answer
    x = 370.69

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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.