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Finding the Fourth Proportional to 442,907.28, 664,466.40 and 143,388

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Solution

The fourth proportional to 442,907.28, 664,466.40 and 143,388 is: 215,116.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,907.28 : 664,466.40 = 143,388 : x
  2. Step 2: Convert to fraction form
    442,907.28/664,466.40 = 143,388/x
  3. Step 3: Cross multiply
    442,907.28x = 664,466.40 × 143,388
  4. Step 4: Simplify right side
    442,907.28x = 95,276,508,163.20
  5. Step 5: Solve for x
    x = 95,276,508,163.20/442,907.28
  6. Step 6: Final answer
    x = 215,116.15

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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.