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Finding the Fourth Proportional to 442,820.20, 664,230.30 and 143,322.70

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Solution

The fourth proportional to 442,820.20, 664,230.30 and 143,322.70 is: 214,984.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,820.20 : 664,230.30 = 143,322.70 : x
  2. Step 2: Convert to fraction form
    442,820.20/664,230.30 = 143,322.70/x
  3. Step 3: Cross multiply
    442,820.20x = 664,230.30 × 143,322.70
  4. Step 4: Simplify right side
    442,820.20x = 95,199,280,017.81
  5. Step 5: Solve for x
    x = 95,199,280,017.81/442,820.20
  6. Step 6: Final answer
    x = 214,984.05

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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.