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Finding the Fourth Proportional to 449,059.42, 619,701.84 and 306,069.18

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Solution

The fourth proportional to 449,059.42, 619,701.84 and 306,069.18 is: 422,375.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,059.42 : 619,701.84 = 306,069.18 : x
  2. Step 2: Convert to fraction form
    449,059.42/619,701.84 = 306,069.18/x
  3. Step 3: Cross multiply
    449,059.42x = 619,701.84 × 306,069.18
  4. Step 4: Simplify right side
    449,059.42x = 189,671,634,013.29
  5. Step 5: Solve for x
    x = 189,671,634,013.29/449,059.42
  6. Step 6: Final answer
    x = 422,375.36

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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.