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Finding the Fourth Proportional to 515,474.20, 711,320.20 and 286,016.94

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Solution

The fourth proportional to 515,474.20, 711,320.20 and 286,016.94 is: 394,684.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,474.20 : 711,320.20 = 286,016.94 : x
  2. Step 2: Convert to fraction form
    515,474.20/711,320.20 = 286,016.94/x
  3. Step 3: Cross multiply
    515,474.20x = 711,320.20 × 286,016.94
  4. Step 4: Simplify right side
    515,474.20x = 203,449,626,249.15
  5. Step 5: Solve for x
    x = 203,449,626,249.15/515,474.20
  6. Step 6: Final answer
    x = 394,684.41

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1.5x scale

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.