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Finding the Fourth Proportional to 442,911.40, 664,280.70 and 143,319.40

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Solution

The fourth proportional to 442,911.40, 664,280.70 and 143,319.40 is: 214,951.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,911.40 : 664,280.70 = 143,319.40 : x
  2. Step 2: Convert to fraction form
    442,911.40/664,280.70 = 143,319.40/x
  3. Step 3: Cross multiply
    442,911.40x = 664,280.70 × 143,319.40
  4. Step 4: Simplify right side
    442,911.40x = 95,204,311,355.58
  5. Step 5: Solve for x
    x = 95,204,311,355.58/442,911.40
  6. Step 6: Final answer
    x = 214,951.14

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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.