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Finding the Fourth Proportional to 297,122.88, 445,820.40 and 128,694.72

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Solution

The fourth proportional to 297,122.88, 445,820.40 and 128,694.72 is: 193,101.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,122.88 : 445,820.40 = 128,694.72 : x
  2. Step 2: Convert to fraction form
    297,122.88/445,820.40 = 128,694.72/x
  3. Step 3: Cross multiply
    297,122.88x = 445,820.40 × 128,694.72
  4. Step 4: Simplify right side
    297,122.88x = 57,374,731,548.29
  5. Step 5: Solve for x
    x = 57,374,731,548.29/297,122.88
  6. Step 6: Final answer
    x = 193,101.02

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1.5x scale

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.