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Finding the Fourth Proportional to 285,215.45, 393,597.41 and 157,891.03

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Solution

The fourth proportional to 285,215.45, 393,597.41 and 157,891.03 is: 217,889.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,215.45 : 393,597.41 = 157,891.03 : x
  2. Step 2: Convert to fraction form
    285,215.45/393,597.41 = 157,891.03/x
  3. Step 3: Cross multiply
    285,215.45x = 393,597.41 × 157,891.03
  4. Step 4: Simplify right side
    285,215.45x = 62,145,498,696.78
  5. Step 5: Solve for x
    x = 62,145,498,696.78/285,215.45
  6. Step 6: Final answer
    x = 217,889.67

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1.5x scale

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.