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Finding the Fourth Proportional to 612.44, 917.19 and 319.16

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Solution

The fourth proportional to 612.44, 917.19 and 319.16 is: 477.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.44 : 917.19 = 319.16 : x
  2. Step 2: Convert to fraction form
    612.44/917.19 = 319.16/x
  3. Step 3: Cross multiply
    612.44x = 917.19 × 319.16
  4. Step 4: Simplify right side
    612.44x = 292,730.36
  5. Step 5: Solve for x
    x = 292,730.36/612.44
  6. Step 6: Final answer
    x = 477.97

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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.