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Finding the Fourth Proportional to 608,715.88, 911,742.30 and 308,679.40

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Solution

The fourth proportional to 608,715.88, 911,742.30 and 308,679.40 is: 462,343.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,715.88 : 911,742.30 = 308,679.40 : x
  2. Step 2: Convert to fraction form
    608,715.88/911,742.30 = 308,679.40/x
  3. Step 3: Cross multiply
    608,715.88x = 911,742.30 × 308,679.40
  4. Step 4: Simplify right side
    608,715.88x = 281,436,066,118.62
  5. Step 5: Solve for x
    x = 281,436,066,118.62/608,715.88
  6. Step 6: Final answer
    x = 462,343.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.