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Finding the Fourth Proportional to 443,107.78, 609,949.38 and 386,420.74

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Solution

The fourth proportional to 443,107.78, 609,949.38 and 386,420.74 is: 531,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,107.78 : 609,949.38 = 386,420.74 : x
  2. Step 2: Convert to fraction form
    443,107.78/609,949.38 = 386,420.74/x
  3. Step 3: Cross multiply
    443,107.78x = 609,949.38 × 386,420.74
  4. Step 4: Simplify right side
    443,107.78x = 235,697,090,782.14
  5. Step 5: Solve for x
    x = 235,697,090,782.14/443,107.78
  6. Step 6: Final answer
    x = 531,918.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.