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Finding the Fourth Proportional to 481,307.78, 663,996.20 and 290,215.01

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Solution

The fourth proportional to 481,307.78, 663,996.20 and 290,215.01 is: 400,370.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,307.78 : 663,996.20 = 290,215.01 : x
  2. Step 2: Convert to fraction form
    481,307.78/663,996.20 = 290,215.01/x
  3. Step 3: Cross multiply
    481,307.78x = 663,996.20 × 290,215.01
  4. Step 4: Simplify right side
    481,307.78x = 192,701,664,031.88
  5. Step 5: Solve for x
    x = 192,701,664,031.88/481,307.78
  6. Step 6: Final answer
    x = 400,370.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.