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Finding the Fourth Proportional to 405,864.21, 560,054.48 and 274,775.21

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Solution

The fourth proportional to 405,864.21, 560,054.48 and 274,775.21 is: 379,163.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,864.21 : 560,054.48 = 274,775.21 : x
  2. Step 2: Convert to fraction form
    405,864.21/560,054.48 = 274,775.21/x
  3. Step 3: Cross multiply
    405,864.21x = 560,054.48 × 274,775.21
  4. Step 4: Simplify right side
    405,864.21x = 153,889,086,962.95
  5. Step 5: Solve for x
    x = 153,889,086,962.95/405,864.21
  6. Step 6: Final answer
    x = 379,163.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.