Home / 928,086.40-1,392,129.60-430,422.40

Finding the Fourth Proportional to 928,086.40, 1,392,129.60 and 430,422.40

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Solution

The fourth proportional to 928,086.40, 1,392,129.60 and 430,422.40 is: 645,633.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,086.40 : 1,392,129.60 = 430,422.40 : x
  2. Step 2: Convert to fraction form
    928,086.40/1,392,129.60 = 430,422.40/x
  3. Step 3: Cross multiply
    928,086.40x = 1,392,129.60 × 430,422.40
  4. Step 4: Simplify right side
    928,086.40x = 599,203,763,543.04
  5. Step 5: Solve for x
    x = 599,203,763,543.04/928,086.40
  6. Step 6: Final answer
    x = 645,633.60

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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.