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Finding the Fourth Proportional to 368,672.20, 552,425.10 and 309,185.80

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Solution

The fourth proportional to 368,672.20, 552,425.10 and 309,185.80 is: 463,289.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,672.20 : 552,425.10 = 309,185.80 : x
  2. Step 2: Convert to fraction form
    368,672.20/552,425.10 = 309,185.80/x
  3. Step 3: Cross multiply
    368,672.20x = 552,425.10 × 309,185.80
  4. Step 4: Simplify right side
    368,672.20x = 170,801,996,483.58
  5. Step 5: Solve for x
    x = 170,801,996,483.58/368,672.20
  6. Step 6: Final answer
    x = 463,289.60

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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.