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Finding the Fourth Proportional to 297,213.44, 445,888.12 and 128,761.80

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Solution

The fourth proportional to 297,213.44, 445,888.12 and 128,761.80 is: 193,172.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,213.44 : 445,888.12 = 128,761.80 : x
  2. Step 2: Convert to fraction form
    297,213.44/445,888.12 = 128,761.80/x
  3. Step 3: Cross multiply
    297,213.44x = 445,888.12 × 128,761.80
  4. Step 4: Simplify right side
    297,213.44x = 57,413,356,929.82
  5. Step 5: Solve for x
    x = 57,413,356,929.82/297,213.44
  6. Step 6: Final answer
    x = 193,172.14

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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.