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Finding the Fourth Proportional to 579,130.44, 868,998.60 and 420,516.60

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Solution

The fourth proportional to 579,130.44, 868,998.60 and 420,516.60 is: 630,994.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,130.44 : 868,998.60 = 420,516.60 : x
  2. Step 2: Convert to fraction form
    579,130.44/868,998.60 = 420,516.60/x
  3. Step 3: Cross multiply
    579,130.44x = 868,998.60 × 420,516.60
  4. Step 4: Simplify right side
    579,130.44x = 365,428,336,676.76
  5. Step 5: Solve for x
    x = 365,428,336,676.76/579,130.44
  6. Step 6: Final answer
    x = 630,994.87

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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.