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Finding the Fourth Proportional to 405,234.40, 608,888.40 and 359,615.20

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Solution

The fourth proportional to 405,234.40, 608,888.40 and 359,615.20 is: 540,342.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,234.40 : 608,888.40 = 359,615.20 : x
  2. Step 2: Convert to fraction form
    405,234.40/608,888.40 = 359,615.20/x
  3. Step 3: Cross multiply
    405,234.40x = 608,888.40 × 359,615.20
  4. Step 4: Simplify right side
    405,234.40x = 218,965,523,743.68
  5. Step 5: Solve for x
    x = 218,965,523,743.68/405,234.40
  6. Step 6: Final answer
    x = 540,342.88

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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.