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Finding the Fourth Proportional to 276,617.84, 381,728.30 and 155,758.75

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Solution

The fourth proportional to 276,617.84, 381,728.30 and 155,758.75 is: 214,944.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,617.84 : 381,728.30 = 155,758.75 : x
  2. Step 2: Convert to fraction form
    276,617.84/381,728.30 = 155,758.75/x
  3. Step 3: Cross multiply
    276,617.84x = 381,728.30 × 155,758.75
  4. Step 4: Simplify right side
    276,617.84x = 59,457,521,114.51
  5. Step 5: Solve for x
    x = 59,457,521,114.51/276,617.84
  6. Step 6: Final answer
    x = 214,944.64

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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.