Home / 393,705.23-543,330.87-221,682.34

Finding the Fourth Proportional to 393,705.23, 543,330.87 and 221,682.34

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Solution

The fourth proportional to 393,705.23, 543,330.87 and 221,682.34 is: 305,931.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,705.23 : 543,330.87 = 221,682.34 : x
  2. Step 2: Convert to fraction form
    393,705.23/543,330.87 = 221,682.34/x
  3. Step 3: Cross multiply
    393,705.23x = 543,330.87 × 221,682.34
  4. Step 4: Simplify right side
    393,705.23x = 120,446,858,655.84
  5. Step 5: Solve for x
    x = 120,446,858,655.84/393,705.23
  6. Step 6: Final answer
    x = 305,931.57

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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.