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Finding the Fourth Proportional to 276,287.63, 381,278.75 and 155,427.93

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Solution

The fourth proportional to 276,287.63, 381,278.75 and 155,427.93 is: 214,491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,287.63 : 381,278.75 = 155,427.93 : x
  2. Step 2: Convert to fraction form
    276,287.63/381,278.75 = 155,427.93/x
  3. Step 3: Cross multiply
    276,287.63x = 381,278.75 × 155,427.93
  4. Step 4: Simplify right side
    276,287.63x = 59,261,366,088.35
  5. Step 5: Solve for x
    x = 59,261,366,088.35/276,287.63
  6. Step 6: Final answer
    x = 214,491.57

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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.