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Finding the Fourth Proportional to 308,398.16, 425,706.48 and 276,074.55

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Solution

The fourth proportional to 308,398.16, 425,706.48 and 276,074.55 is: 381,087.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,398.16 : 425,706.48 = 276,074.55 : x
  2. Step 2: Convert to fraction form
    308,398.16/425,706.48 = 276,074.55/x
  3. Step 3: Cross multiply
    308,398.16x = 425,706.48 × 276,074.55
  4. Step 4: Simplify right side
    308,398.16x = 117,526,724,898.08
  5. Step 5: Solve for x
    x = 117,526,724,898.08/308,398.16
  6. Step 6: Final answer
    x = 381,087.64

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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.