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Finding the Fourth Proportional to 468,421.20, 702,558.90 and 131,428.80

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Solution

The fourth proportional to 468,421.20, 702,558.90 and 131,428.80 is: 197,122.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,421.20 : 702,558.90 = 131,428.80 : x
  2. Step 2: Convert to fraction form
    468,421.20/702,558.90 = 131,428.80/x
  3. Step 3: Cross multiply
    468,421.20x = 702,558.90 × 131,428.80
  4. Step 4: Simplify right side
    468,421.20x = 92,336,473,156.32
  5. Step 5: Solve for x
    x = 92,336,473,156.32/468,421.20
  6. Step 6: Final answer
    x = 197,122.75

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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.