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Finding the Fourth Proportional to 384,556.14, 530,671.05 and 221,200.20

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Solution

The fourth proportional to 384,556.14, 530,671.05 and 221,200.20 is: 305,246.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,556.14 : 530,671.05 = 221,200.20 : x
  2. Step 2: Convert to fraction form
    384,556.14/530,671.05 = 221,200.20/x
  3. Step 3: Cross multiply
    384,556.14x = 530,671.05 × 221,200.20
  4. Step 4: Simplify right side
    384,556.14x = 117,384,542,394.21
  5. Step 5: Solve for x
    x = 117,384,542,394.21/384,556.14
  6. Step 6: Final answer
    x = 305,246.83

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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.