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Finding the Fourth Proportional to 421,396.35, 581,685.09 and 276,211.48

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Solution

The fourth proportional to 421,396.35, 581,685.09 and 276,211.48 is: 381,275.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,396.35 : 581,685.09 = 276,211.48 : x
  2. Step 2: Convert to fraction form
    421,396.35/581,685.09 = 276,211.48/x
  3. Step 3: Cross multiply
    421,396.35x = 581,685.09 × 276,211.48
  4. Step 4: Simplify right side
    421,396.35x = 160,668,099,602.83
  5. Step 5: Solve for x
    x = 160,668,099,602.83/421,396.35
  6. Step 6: Final answer
    x = 381,275.49

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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.