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Finding the Fourth Proportional to 405,689.20, 608,002.60 and 218,297.20

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Solution

The fourth proportional to 405,689.20, 608,002.60 and 218,297.20 is: 327,159.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,689.20 : 608,002.60 = 218,297.20 : x
  2. Step 2: Convert to fraction form
    405,689.20/608,002.60 = 218,297.20/x
  3. Step 3: Cross multiply
    405,689.20x = 608,002.60 × 218,297.20
  4. Step 4: Simplify right side
    405,689.20x = 132,725,265,172.72
  5. Step 5: Solve for x
    x = 132,725,265,172.72/405,689.20
  6. Step 6: Final answer
    x = 327,159.97

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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.