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Finding the Fourth Proportional to 390,042.15, 585,063.23 and 327,056.55

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Solution

The fourth proportional to 390,042.15, 585,063.23 and 327,056.55 is: 490,584.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,042.15 : 585,063.23 = 327,056.55 : x
  2. Step 2: Convert to fraction form
    390,042.15/585,063.23 = 327,056.55/x
  3. Step 3: Cross multiply
    390,042.15x = 585,063.23 × 327,056.55
  4. Step 4: Simplify right side
    390,042.15x = 191,348,759,900.37
  5. Step 5: Solve for x
    x = 191,348,759,900.37/390,042.15
  6. Step 6: Final answer
    x = 490,584.83

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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.