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Finding the Fourth Proportional to 442,712.40, 663,982.20 and 143,120.40

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Solution

The fourth proportional to 442,712.40, 663,982.20 and 143,120.40 is: 214,652.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,712.40 : 663,982.20 = 143,120.40 : x
  2. Step 2: Convert to fraction form
    442,712.40/663,982.20 = 143,120.40/x
  3. Step 3: Cross multiply
    442,712.40x = 663,982.20 × 143,120.40
  4. Step 4: Simplify right side
    442,712.40x = 95,029,398,056.88
  5. Step 5: Solve for x
    x = 95,029,398,056.88/442,712.40
  6. Step 6: Final answer
    x = 214,652.67

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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.