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Finding the Fourth Proportional to 281,896.32, 388,575.36 and 213,640.08

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Solution

The fourth proportional to 281,896.32, 388,575.36 and 213,640.08 is: 294,488.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,896.32 : 388,575.36 = 213,640.08 : x
  2. Step 2: Convert to fraction form
    281,896.32/388,575.36 = 213,640.08/x
  3. Step 3: Cross multiply
    281,896.32x = 388,575.36 × 213,640.08
  4. Step 4: Simplify right side
    281,896.32x = 83,015,270,996.43
  5. Step 5: Solve for x
    x = 83,015,270,996.43/281,896.32
  6. Step 6: Final answer
    x = 294,488.67

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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.