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Finding the Fourth Proportional to 442,805.70, 664,208.55 and 143,308.20

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Solution

The fourth proportional to 442,805.70, 664,208.55 and 143,308.20 is: 214,962.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,805.70 : 664,208.55 = 143,308.20 : x
  2. Step 2: Convert to fraction form
    442,805.70/664,208.55 = 143,308.20/x
  3. Step 3: Cross multiply
    442,805.70x = 664,208.55 × 143,308.20
  4. Step 4: Simplify right side
    442,805.70x = 95,186,531,725.11
  5. Step 5: Solve for x
    x = 95,186,531,725.11/442,805.70
  6. Step 6: Final answer
    x = 214,962.30

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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.