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Finding the Fourth Proportional to 607.79, 838.80 and 345.85

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Solution

The fourth proportional to 607.79, 838.80 and 345.85 is: 477.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.79 : 838.80 = 345.85 : x
  2. Step 2: Convert to fraction form
    607.79/838.80 = 345.85/x
  3. Step 3: Cross multiply
    607.79x = 838.80 × 345.85
  4. Step 4: Simplify right side
    607.79x = 290,096.88
  5. Step 5: Solve for x
    x = 290,096.88/607.79
  6. Step 6: Final answer
    x = 477.30

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1.5x scale

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.