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Finding the Fourth Proportional to 443,997.47, 612,307.65 and 290,979.91

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Solution

The fourth proportional to 443,997.47, 612,307.65 and 290,979.91 is: 401,284.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,997.47 : 612,307.65 = 290,979.91 : x
  2. Step 2: Convert to fraction form
    443,997.47/612,307.65 = 290,979.91/x
  3. Step 3: Cross multiply
    443,997.47x = 612,307.65 × 290,979.91
  4. Step 4: Simplify right side
    443,997.47x = 178,169,226,745.87
  5. Step 5: Solve for x
    x = 178,169,226,745.87/443,997.47
  6. Step 6: Final answer
    x = 401,284.33

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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.