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Finding the Fourth Proportional to 390,069.15, 585,103.73 and 327,083.55

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Solution

The fourth proportional to 390,069.15, 585,103.73 and 327,083.55 is: 490,625.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,069.15 : 585,103.73 = 327,083.55 : x
  2. Step 2: Convert to fraction form
    390,069.15/585,103.73 = 327,083.55/x
  3. Step 3: Cross multiply
    390,069.15x = 585,103.73 × 327,083.55
  4. Step 4: Simplify right side
    390,069.15x = 191,377,803,491.22
  5. Step 5: Solve for x
    x = 191,377,803,491.22/390,069.15
  6. Step 6: Final answer
    x = 490,625.33

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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.