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Finding the Fourth Proportional to 607.70, 838.64 and 345.73

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Solution

The fourth proportional to 607.70, 838.64 and 345.73 is: 477.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.70 : 838.64 = 345.73 : x
  2. Step 2: Convert to fraction form
    607.70/838.64 = 345.73/x
  3. Step 3: Cross multiply
    607.70x = 838.64 × 345.73
  4. Step 4: Simplify right side
    607.70x = 289,943.01
  5. Step 5: Solve for x
    x = 289,943.01/607.70
  6. Step 6: Final answer
    x = 477.12

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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.