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Finding the Fourth Proportional to 607.87, 838.78 and 345.79

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Solution

The fourth proportional to 607.87, 838.78 and 345.79 is: 477.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.87 : 838.78 = 345.79 : x
  2. Step 2: Convert to fraction form
    607.87/838.78 = 345.79/x
  3. Step 3: Cross multiply
    607.87x = 838.78 × 345.79
  4. Step 4: Simplify right side
    607.87x = 290,041.74
  5. Step 5: Solve for x
    x = 290,041.74/607.87
  6. Step 6: Final answer
    x = 477.14

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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.