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Finding the Fourth Proportional to 478,634.49, 660,546.70 and 274,751.42

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Solution

The fourth proportional to 478,634.49, 660,546.70 and 274,751.42 is: 379,174.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,634.49 : 660,546.70 = 274,751.42 : x
  2. Step 2: Convert to fraction form
    478,634.49/660,546.70 = 274,751.42/x
  3. Step 3: Cross multiply
    478,634.49x = 660,546.70 × 274,751.42
  4. Step 4: Simplify right side
    478,634.49x = 181,486,139,811.70
  5. Step 5: Solve for x
    x = 181,486,139,811.70/478,634.49
  6. Step 6: Final answer
    x = 379,174.81

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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.