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Finding the Fourth Proportional to 607.79, 838.70 and 345.75

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Solution

The fourth proportional to 607.79, 838.70 and 345.75 is: 477.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.79 : 838.70 = 345.75 : x
  2. Step 2: Convert to fraction form
    607.79/838.70 = 345.75/x
  3. Step 3: Cross multiply
    607.79x = 838.70 × 345.75
  4. Step 4: Simplify right side
    607.79x = 289,978.80
  5. Step 5: Solve for x
    x = 289,978.80/607.79
  6. Step 6: Final answer
    x = 477.11

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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.