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Finding the Fourth Proportional to 553,705.20, 830,557.80 and 543,207.60

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Solution

The fourth proportional to 553,705.20, 830,557.80 and 543,207.60 is: 814,811.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,705.20 : 830,557.80 = 543,207.60 : x
  2. Step 2: Convert to fraction form
    553,705.20/830,557.80 = 543,207.60/x
  3. Step 3: Cross multiply
    553,705.20x = 830,557.80 × 543,207.60
  4. Step 4: Simplify right side
    553,705.20x = 451,165,309,199.28
  5. Step 5: Solve for x
    x = 451,165,309,199.28/553,705.20
  6. Step 6: Final answer
    x = 814,811.40

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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.