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Finding the Fourth Proportional to 276,339.80, 381,318 and 155,522.63

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Solution

The fourth proportional to 276,339.80, 381,318 and 155,522.63 is: 214,603.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,339.80 : 381,318 = 155,522.63 : x
  2. Step 2: Convert to fraction form
    276,339.80/381,318 = 155,522.63/x
  3. Step 3: Cross multiply
    276,339.80x = 381,318 × 155,522.63
  4. Step 4: Simplify right side
    276,339.80x = 59,303,576,319.75
  5. Step 5: Solve for x
    x = 59,303,576,319.75/276,339.80
  6. Step 6: Final answer
    x = 214,603.82

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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.