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Finding the Fourth Proportional to 401,136.72, 601,721.72 and 330,885.20

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Solution

The fourth proportional to 401,136.72, 601,721.72 and 330,885.20 is: 496,341.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,136.72 : 601,721.72 = 330,885.20 : x
  2. Step 2: Convert to fraction form
    401,136.72/601,721.72 = 330,885.20/x
  3. Step 3: Cross multiply
    401,136.72x = 601,721.72 × 330,885.20
  4. Step 4: Simplify right side
    401,136.72x = 199,100,811,666.54
  5. Step 5: Solve for x
    x = 199,100,811,666.54/401,136.72
  6. Step 6: Final answer
    x = 496,341.53

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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.