Home / 285,081,830.72-393,412,927.20-154,701,638.72

Finding the Fourth Proportional to 285,081,830.72, 393,412,927.20 and 154,701,638.72

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Solution

The fourth proportional to 285,081,830.72, 393,412,927.20 and 154,701,638.72 is: 213,488,261.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,081,830.72 : 393,412,927.20 = 154,701,638.72 : x
  2. Step 2: Convert to fraction form
    285,081,830.72/393,412,927.20 = 154,701,638.72/x
  3. Step 3: Cross multiply
    285,081,830.72x = 393,412,927.20 × 154,701,638.72
  4. Step 4: Simplify right side
    285,081,830.72x = 60,861,624,531,472,056
  5. Step 5: Solve for x
    x = 60,861,624,531,472,056/285,081,830.72
  6. Step 6: Final answer
    x = 213,488,261.87

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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.