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Finding the Fourth Proportional to 646,736.20, 970,104.30 and 640,515.40

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Solution

The fourth proportional to 646,736.20, 970,104.30 and 640,515.40 is: 960,773.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,736.20 : 970,104.30 = 640,515.40 : x
  2. Step 2: Convert to fraction form
    646,736.20/970,104.30 = 640,515.40/x
  3. Step 3: Cross multiply
    646,736.20x = 970,104.30 × 640,515.40
  4. Step 4: Simplify right side
    646,736.20x = 621,366,743,756.22
  5. Step 5: Solve for x
    x = 621,366,743,756.22/646,736.20
  6. Step 6: Final answer
    x = 960,773.10

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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.