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Finding the Fourth Proportional to 276,215.44, 381,173.53 and 155,356.67

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Solution

The fourth proportional to 276,215.44, 381,173.53 and 155,356.67 is: 214,390.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,215.44 : 381,173.53 = 155,356.67 : x
  2. Step 2: Convert to fraction form
    276,215.44/381,173.53 = 155,356.67/x
  3. Step 3: Cross multiply
    276,215.44x = 381,173.53 × 155,356.67
  4. Step 4: Simplify right side
    276,215.44x = 59,217,850,312.95
  5. Step 5: Solve for x
    x = 59,217,850,312.95/276,215.44
  6. Step 6: Final answer
    x = 214,390.08

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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.