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Finding the Fourth Proportional to 612.06, 844.64 and 339.21

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Solution

The fourth proportional to 612.06, 844.64 and 339.21 is: 468.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.06 : 844.64 = 339.21 : x
  2. Step 2: Convert to fraction form
    612.06/844.64 = 339.21/x
  3. Step 3: Cross multiply
    612.06x = 844.64 × 339.21
  4. Step 4: Simplify right side
    612.06x = 286,508.64
  5. Step 5: Solve for x
    x = 286,508.64/612.06
  6. Step 6: Final answer
    x = 468.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.