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Finding the Fourth Proportional to 515,270.60, 711,158.50 and 285,901.70

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Solution

The fourth proportional to 515,270.60, 711,158.50 and 285,901.70 is: 394,591.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,270.60 : 711,158.50 = 285,901.70 : x
  2. Step 2: Convert to fraction form
    515,270.60/711,158.50 = 285,901.70/x
  3. Step 3: Cross multiply
    515,270.60x = 711,158.50 × 285,901.70
  4. Step 4: Simplify right side
    515,270.60x = 203,321,424,119.45
  5. Step 5: Solve for x
    x = 203,321,424,119.45/515,270.60
  6. Step 6: Final answer
    x = 394,591.55

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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.