Home / 646,733.20-970,099.80-640,512.40

Finding the Fourth Proportional to 646,733.20, 970,099.80 and 640,512.40

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Solution

The fourth proportional to 646,733.20, 970,099.80 and 640,512.40 is: 960,768.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,733.20 : 970,099.80 = 640,512.40 : x
  2. Step 2: Convert to fraction form
    646,733.20/970,099.80 = 640,512.40/x
  3. Step 3: Cross multiply
    646,733.20x = 970,099.80 × 640,512.40
  4. Step 4: Simplify right side
    646,733.20x = 621,360,951,137.52
  5. Step 5: Solve for x
    x = 621,360,951,137.52/646,733.20
  6. Step 6: Final answer
    x = 960,768.60

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Half scale
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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.