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Finding the Fourth Proportional to 489,086.72, 674,931.03 and 274,226.12

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Solution

The fourth proportional to 489,086.72, 674,931.03 and 274,226.12 is: 378,427.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,086.72 : 674,931.03 = 274,226.12 : x
  2. Step 2: Convert to fraction form
    489,086.72/674,931.03 = 274,226.12/x
  3. Step 3: Cross multiply
    489,086.72x = 674,931.03 × 274,226.12
  4. Step 4: Simplify right side
    489,086.72x = 185,083,717,624.50
  5. Step 5: Solve for x
    x = 185,083,717,624.50/489,086.72
  6. Step 6: Final answer
    x = 378,427.20

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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.