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Finding the Fourth Proportional to 368,117.20, 552,175.80 and 218,526.40

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Solution

The fourth proportional to 368,117.20, 552,175.80 and 218,526.40 is: 327,789.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,117.20 : 552,175.80 = 218,526.40 : x
  2. Step 2: Convert to fraction form
    368,117.20/552,175.80 = 218,526.40/x
  3. Step 3: Cross multiply
    368,117.20x = 552,175.80 × 218,526.40
  4. Step 4: Simplify right side
    368,117.20x = 120,664,989,741.12
  5. Step 5: Solve for x
    x = 120,664,989,741.12/368,117.20
  6. Step 6: Final answer
    x = 327,789.60

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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.