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Finding the Fourth Proportional to 215,754.84, 321,984.72 and 192,135.24

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Solution

The fourth proportional to 215,754.84, 321,984.72 and 192,135.24 is: 286,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,754.84 : 321,984.72 = 192,135.24 : x
  2. Step 2: Convert to fraction form
    215,754.84/321,984.72 = 192,135.24/x
  3. Step 3: Cross multiply
    215,754.84x = 321,984.72 × 192,135.24
  4. Step 4: Simplify right side
    215,754.84x = 61,864,611,453.53
  5. Step 5: Solve for x
    x = 61,864,611,453.53/215,754.84
  6. Step 6: Final answer
    x = 286,735.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.