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Finding the Fourth Proportional to 623,816.40, 934,412.40 and 518,840.40

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Solution

The fourth proportional to 623,816.40, 934,412.40 and 518,840.40 is: 777,169.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,816.40 : 934,412.40 = 518,840.40 : x
  2. Step 2: Convert to fraction form
    623,816.40/934,412.40 = 518,840.40/x
  3. Step 3: Cross multiply
    623,816.40x = 934,412.40 × 518,840.40
  4. Step 4: Simplify right side
    623,816.40x = 484,810,903,380.96
  5. Step 5: Solve for x
    x = 484,810,903,380.96/623,816.40
  6. Step 6: Final answer
    x = 777,169.22

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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.