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Finding the Fourth Proportional to 646,872.40, 970,308.60 and 411,259.60

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Solution

The fourth proportional to 646,872.40, 970,308.60 and 411,259.60 is: 616,889.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,872.40 : 970,308.60 = 411,259.60 : x
  2. Step 2: Convert to fraction form
    646,872.40/970,308.60 = 411,259.60/x
  3. Step 3: Cross multiply
    646,872.40x = 970,308.60 × 411,259.60
  4. Step 4: Simplify right side
    646,872.40x = 399,048,726,712.56
  5. Step 5: Solve for x
    x = 399,048,726,712.56/646,872.40
  6. Step 6: Final answer
    x = 616,889.40

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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.