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Finding the Fourth Proportional to 386,133.60, 579,200.40 and 351,919.20

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Solution

The fourth proportional to 386,133.60, 579,200.40 and 351,919.20 is: 527,878.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,133.60 : 579,200.40 = 351,919.20 : x
  2. Step 2: Convert to fraction form
    386,133.60/579,200.40 = 351,919.20/x
  3. Step 3: Cross multiply
    386,133.60x = 579,200.40 × 351,919.20
  4. Step 4: Simplify right side
    386,133.60x = 203,831,741,407.68
  5. Step 5: Solve for x
    x = 203,831,741,407.68/386,133.60
  6. Step 6: Final answer
    x = 527,878.80

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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.