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Finding the Fourth Proportional to 299,278.80, 448,980.60 and 99,661.20

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Solution

The fourth proportional to 299,278.80, 448,980.60 and 99,661.20 is: 149,512.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,278.80 : 448,980.60 = 99,661.20 : x
  2. Step 2: Convert to fraction form
    299,278.80/448,980.60 = 99,661.20/x
  3. Step 3: Cross multiply
    299,278.80x = 448,980.60 × 99,661.20
  4. Step 4: Simplify right side
    299,278.80x = 44,745,945,372.72
  5. Step 5: Solve for x
    x = 44,745,945,372.72/299,278.80
  6. Step 6: Final answer
    x = 149,512.58

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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.