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Finding the Fourth Proportional to 579,274.80, 868,912.20 and 279,985.20

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Solution

The fourth proportional to 579,274.80, 868,912.20 and 279,985.20 is: 419,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,274.80 : 868,912.20 = 279,985.20 : x
  2. Step 2: Convert to fraction form
    579,274.80/868,912.20 = 279,985.20/x
  3. Step 3: Cross multiply
    579,274.80x = 868,912.20 × 279,985.20
  4. Step 4: Simplify right side
    579,274.80x = 243,282,556,099.44
  5. Step 5: Solve for x
    x = 243,282,556,099.44/579,274.80
  6. Step 6: Final answer
    x = 419,977.80

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Double scale
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Similar ratio
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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.