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Finding the Fourth Proportional to 515,793.47, 711,762.18 and 286,355.30

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Solution

The fourth proportional to 515,793.47, 711,762.18 and 286,355.30 is: 395,152.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,793.47 : 711,762.18 = 286,355.30 : x
  2. Step 2: Convert to fraction form
    515,793.47/711,762.18 = 286,355.30/x
  3. Step 3: Cross multiply
    515,793.47x = 711,762.18 × 286,355.30
  4. Step 4: Simplify right side
    515,793.47x = 203,816,869,023.74
  5. Step 5: Solve for x
    x = 203,816,869,023.74/515,793.47
  6. Step 6: Final answer
    x = 395,152.10

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.