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Finding the Fourth Proportional to 399,266.20, 550,914.78 and 238,130.20

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Solution

The fourth proportional to 399,266.20, 550,914.78 and 238,130.20 is: 328,576.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,266.20 : 550,914.78 = 238,130.20 : x
  2. Step 2: Convert to fraction form
    399,266.20/550,914.78 = 238,130.20/x
  3. Step 3: Cross multiply
    399,266.20x = 550,914.78 × 238,130.20
  4. Step 4: Simplify right side
    399,266.20x = 131,189,446,744.36
  5. Step 5: Solve for x
    x = 131,189,446,744.36/399,266.20
  6. Step 6: Final answer
    x = 328,576.39

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1.5x scale

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.