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Finding the Fourth Proportional to 720,198.93, 993,862.86 and 393,504.93

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Solution

The fourth proportional to 720,198.93, 993,862.86 and 393,504.93 is: 543,030.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,198.93 : 993,862.86 = 393,504.93 : x
  2. Step 2: Convert to fraction form
    720,198.93/993,862.86 = 393,504.93/x
  3. Step 3: Cross multiply
    720,198.93x = 993,862.86 × 393,504.93
  4. Step 4: Simplify right side
    720,198.93x = 391,089,935,153.90
  5. Step 5: Solve for x
    x = 391,089,935,153.90/720,198.93
  6. Step 6: Final answer
    x = 543,030.43

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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.