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Finding the Fourth Proportional to 449,530.76, 620,476.02 and 279,663.56

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Solution

The fourth proportional to 449,530.76, 620,476.02 and 279,663.56 is: 386,012.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,530.76 : 620,476.02 = 279,663.56 : x
  2. Step 2: Convert to fraction form
    449,530.76/620,476.02 = 279,663.56/x
  3. Step 3: Cross multiply
    449,530.76x = 620,476.02 × 279,663.56
  4. Step 4: Simplify right side
    449,530.76x = 173,524,532,647.83
  5. Step 5: Solve for x
    x = 173,524,532,647.83/449,530.76
  6. Step 6: Final answer
    x = 386,012.59

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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.