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Finding the Fourth Proportional to 445,878.88, 668,805.36 and 130,343.20

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Solution

The fourth proportional to 445,878.88, 668,805.36 and 130,343.20 is: 195,511.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,878.88 : 668,805.36 = 130,343.20 : x
  2. Step 2: Convert to fraction form
    445,878.88/668,805.36 = 130,343.20/x
  3. Step 3: Cross multiply
    445,878.88x = 668,805.36 × 130,343.20
  4. Step 4: Simplify right side
    445,878.88x = 87,174,230,799.55
  5. Step 5: Solve for x
    x = 87,174,230,799.55/445,878.88
  6. Step 6: Final answer
    x = 195,511.01

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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.