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Finding the Fourth Proportional to 607.77, 838.81 and 442.73

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Solution

The fourth proportional to 607.77, 838.81 and 442.73 is: 611.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.77 : 838.81 = 442.73 : x
  2. Step 2: Convert to fraction form
    607.77/838.81 = 442.73/x
  3. Step 3: Cross multiply
    607.77x = 838.81 × 442.73
  4. Step 4: Simplify right side
    607.77x = 371,366.35
  5. Step 5: Solve for x
    x = 371,366.35/607.77
  6. Step 6: Final answer
    x = 611.03

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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.