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Finding the Fourth Proportional to 445,876.20, 668,814.30 and 165,335.40

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Solution

The fourth proportional to 445,876.20, 668,814.30 and 165,335.40 is: 248,003.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,876.20 : 668,814.30 = 165,335.40 : x
  2. Step 2: Convert to fraction form
    445,876.20/668,814.30 = 165,335.40/x
  3. Step 3: Cross multiply
    445,876.20x = 668,814.30 × 165,335.40
  4. Step 4: Simplify right side
    445,876.20x = 110,578,679,816.22
  5. Step 5: Solve for x
    x = 110,578,679,816.22/445,876.20
  6. Step 6: Final answer
    x = 248,003.10

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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.