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Finding the Fourth Proportional to 809,100,979.40, 1,213,651,469.10 and 809,100,979.40

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Solution

The fourth proportional to 809,100,979.40, 1,213,651,469.10 and 809,100,979.40 is: 1,213,651,469.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,100,979.40 : 1,213,651,469.10 = 809,100,979.40 : x
  2. Step 2: Convert to fraction form
    809,100,979.40/1,213,651,469.10 = 809,100,979.40/x
  3. Step 3: Cross multiply
    809,100,979.40x = 1,213,651,469.10 × 809,100,979.40
  4. Step 4: Simplify right side
    809,100,979.40x = 981,966,592,299,058,688
  5. Step 5: Solve for x
    x = 981,966,592,299,058,688/809,100,979.40
  6. Step 6: Final answer
    x = 1,213,651,469.10

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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.