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Finding the Fourth Proportional to 405,162.80, 606,869.40 and 263,445.20

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Solution

The fourth proportional to 405,162.80, 606,869.40 and 263,445.20 is: 394,598.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,162.80 : 606,869.40 = 263,445.20 : x
  2. Step 2: Convert to fraction form
    405,162.80/606,869.40 = 263,445.20/x
  3. Step 3: Cross multiply
    405,162.80x = 606,869.40 × 263,445.20
  4. Step 4: Simplify right side
    405,162.80x = 159,876,830,456.88
  5. Step 5: Solve for x
    x = 159,876,830,456.88/405,162.80
  6. Step 6: Final answer
    x = 394,598.99

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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.