Home / 743,408.40-1,115,112.60-519,459.60

Finding the Fourth Proportional to 743,408.40, 1,115,112.60 and 519,459.60

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Solution

The fourth proportional to 743,408.40, 1,115,112.60 and 519,459.60 is: 779,189.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,408.40 : 1,115,112.60 = 519,459.60 : x
  2. Step 2: Convert to fraction form
    743,408.40/1,115,112.60 = 519,459.60/x
  3. Step 3: Cross multiply
    743,408.40x = 1,115,112.60 × 519,459.60
  4. Step 4: Simplify right side
    743,408.40x = 579,255,945,150.96
  5. Step 5: Solve for x
    x = 579,255,945,150.96/743,408.40
  6. Step 6: Final answer
    x = 779,189.40

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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.