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Finding the Fourth Proportional to 276,597.48, 381,700.30 and 155,738.40

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Solution

The fourth proportional to 276,597.48, 381,700.30 and 155,738.40 is: 214,916.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,597.48 : 381,700.30 = 155,738.40 : x
  2. Step 2: Convert to fraction form
    276,597.48/381,700.30 = 155,738.40/x
  3. Step 3: Cross multiply
    276,597.48x = 381,700.30 × 155,738.40
  4. Step 4: Simplify right side
    276,597.48x = 59,445,392,472.81
  5. Step 5: Solve for x
    x = 59,445,392,472.81/276,597.48
  6. Step 6: Final answer
    x = 214,916.61

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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.