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Finding the Fourth Proportional to 581,313.78, 870,704.91 and 281,161.26

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Solution

The fourth proportional to 581,313.78, 870,704.91 and 281,161.26 is: 421,129.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,313.78 : 870,704.91 = 281,161.26 : x
  2. Step 2: Convert to fraction form
    581,313.78/870,704.91 = 281,161.26/x
  3. Step 3: Cross multiply
    581,313.78x = 870,704.91 × 281,161.26
  4. Step 4: Simplify right side
    581,313.78x = 244,808,489,583.79
  5. Step 5: Solve for x
    x = 244,808,489,583.79/581,313.78
  6. Step 6: Final answer
    x = 421,129.69

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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.