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Finding the Fourth Proportional to 381,922.88, 572,885.88 and 129,205.28

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Solution

The fourth proportional to 381,922.88, 572,885.88 and 129,205.28 is: 193,808.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,922.88 : 572,885.88 = 129,205.28 : x
  2. Step 2: Convert to fraction form
    381,922.88/572,885.88 = 129,205.28/x
  3. Step 3: Cross multiply
    381,922.88x = 572,885.88 × 129,205.28
  4. Step 4: Simplify right side
    381,922.88x = 74,019,880,533.45
  5. Step 5: Solve for x
    x = 74,019,880,533.45/381,922.88
  6. Step 6: Final answer
    x = 193,808.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.