Home / 859,638.70-1,289,458.05-219,941.20

Finding the Fourth Proportional to 859,638.70, 1,289,458.05 and 219,941.20

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Solution

The fourth proportional to 859,638.70, 1,289,458.05 and 219,941.20 is: 329,911.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,638.70 : 1,289,458.05 = 219,941.20 : x
  2. Step 2: Convert to fraction form
    859,638.70/1,289,458.05 = 219,941.20/x
  3. Step 3: Cross multiply
    859,638.70x = 1,289,458.05 × 219,941.20
  4. Step 4: Simplify right side
    859,638.70x = 283,604,950,866.66
  5. Step 5: Solve for x
    x = 283,604,950,866.66/859,638.70
  6. Step 6: Final answer
    x = 329,911.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.