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Finding the Fourth Proportional to 621,893.90, 931,345.97 and 354,844.80

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Solution

The fourth proportional to 621,893.90, 931,345.97 and 354,844.80 is: 531,414.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,893.90 : 931,345.97 = 354,844.80 : x
  2. Step 2: Convert to fraction form
    621,893.90/931,345.97 = 354,844.80/x
  3. Step 3: Cross multiply
    621,893.90x = 931,345.97 × 354,844.80
  4. Step 4: Simplify right side
    621,893.90x = 330,483,272,681.23
  5. Step 5: Solve for x
    x = 330,483,272,681.23/621,893.90
  6. Step 6: Final answer
    x = 531,414.24

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1.5x scale

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.