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Finding the Fourth Proportional to 621,858.30, 931,405.05 and 538,914.30

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Solution

The fourth proportional to 621,858.30, 931,405.05 and 538,914.30 is: 807,173.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,858.30 : 931,405.05 = 538,914.30 : x
  2. Step 2: Convert to fraction form
    621,858.30/931,405.05 = 538,914.30/x
  3. Step 3: Cross multiply
    621,858.30x = 931,405.05 × 538,914.30
  4. Step 4: Simplify right side
    621,858.30x = 501,947,500,537.22
  5. Step 5: Solve for x
    x = 501,947,500,537.22/621,858.30
  6. Step 6: Final answer
    x = 807,173.44

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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.