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Finding the Fourth Proportional to 393,807.44, 543,421.76 and 221,741.12

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Solution

The fourth proportional to 393,807.44, 543,421.76 and 221,741.12 is: 305,984.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,807.44 : 543,421.76 = 221,741.12 : x
  2. Step 2: Convert to fraction form
    393,807.44/543,421.76 = 221,741.12/x
  3. Step 3: Cross multiply
    393,807.44x = 543,421.76 × 221,741.12
  4. Step 4: Simplify right side
    393,807.44x = 120,498,949,694.77
  5. Step 5: Solve for x
    x = 120,498,949,694.77/393,807.44
  6. Step 6: Final answer
    x = 305,984.44

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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.