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Finding the Fourth Proportional to 276,356.60, 381,394.53 and 155,490.83

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Solution

The fourth proportional to 276,356.60, 381,394.53 and 155,490.83 is: 214,589.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,356.60 : 381,394.53 = 155,490.83 : x
  2. Step 2: Convert to fraction form
    276,356.60/381,394.53 = 155,490.83/x
  3. Step 3: Cross multiply
    276,356.60x = 381,394.53 × 155,490.83
  4. Step 4: Simplify right side
    276,356.60x = 59,303,350,120.19
  5. Step 5: Solve for x
    x = 59,303,350,120.19/276,356.60
  6. Step 6: Final answer
    x = 214,589.96

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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.