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Finding the Fourth Proportional to 278,944.40, 418,416.60 and 194,963.60

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Solution

The fourth proportional to 278,944.40, 418,416.60 and 194,963.60 is: 292,445.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,944.40 : 418,416.60 = 194,963.60 : x
  2. Step 2: Convert to fraction form
    278,944.40/418,416.60 = 194,963.60/x
  3. Step 3: Cross multiply
    278,944.40x = 418,416.60 × 194,963.60
  4. Step 4: Simplify right side
    278,944.40x = 81,576,006,635.76
  5. Step 5: Solve for x
    x = 81,576,006,635.76/278,944.40
  6. Step 6: Final answer
    x = 292,445.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.