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Finding the Fourth Proportional to 652,142.80, 978,214.20 and 449,189.20

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Solution

The fourth proportional to 652,142.80, 978,214.20 and 449,189.20 is: 673,783.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,142.80 : 978,214.20 = 449,189.20 : x
  2. Step 2: Convert to fraction form
    652,142.80/978,214.20 = 449,189.20/x
  3. Step 3: Cross multiply
    652,142.80x = 978,214.20 × 449,189.20
  4. Step 4: Simplify right side
    652,142.80x = 439,403,253,926.64
  5. Step 5: Solve for x
    x = 439,403,253,926.64/652,142.80
  6. Step 6: Final answer
    x = 673,783.80

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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.