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Finding the Fourth Proportional to 607.95, 838.62 and 345.78

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Solution

The fourth proportional to 607.95, 838.62 and 345.78 is: 476.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.95 : 838.62 = 345.78 : x
  2. Step 2: Convert to fraction form
    607.95/838.62 = 345.78/x
  3. Step 3: Cross multiply
    607.95x = 838.62 × 345.78
  4. Step 4: Simplify right side
    607.95x = 289,978.02
  5. Step 5: Solve for x
    x = 289,978.02/607.95
  6. Step 6: Final answer
    x = 476.98

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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.