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Finding the Fourth Proportional to 386,638.22, 579,665.73 and 253,551.98

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Solution

The fourth proportional to 386,638.22, 579,665.73 and 253,551.98 is: 380,136.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,638.22 : 579,665.73 = 253,551.98 : x
  2. Step 2: Convert to fraction form
    386,638.22/579,665.73 = 253,551.98/x
  3. Step 3: Cross multiply
    386,638.22x = 579,665.73 × 253,551.98
  4. Step 4: Simplify right side
    386,638.22x = 146,975,393,579.65
  5. Step 5: Solve for x
    x = 146,975,393,579.65/386,638.22
  6. Step 6: Final answer
    x = 380,136.74

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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.