Home / 726,128.90-1,089,193.35-411,200.90

Finding the Fourth Proportional to 726,128.90, 1,089,193.35 and 411,200.90

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Solution

The fourth proportional to 726,128.90, 1,089,193.35 and 411,200.90 is: 616,801.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,128.90 : 1,089,193.35 = 411,200.90 : x
  2. Step 2: Convert to fraction form
    726,128.90/1,089,193.35 = 411,200.90/x
  3. Step 3: Cross multiply
    726,128.90x = 1,089,193.35 × 411,200.90
  4. Step 4: Simplify right side
    726,128.90x = 447,877,285,794.02
  5. Step 5: Solve for x
    x = 447,877,285,794.02/726,128.90
  6. Step 6: Final answer
    x = 616,801.35

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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.