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Finding the Fourth Proportional to 806,718,908.80, 1,210,078,363.20 and 788,803,004.80

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Solution

The fourth proportional to 806,718,908.80, 1,210,078,363.20 and 788,803,004.80 is: 1,183,204,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,718,908.80 : 1,210,078,363.20 = 788,803,004.80 : x
  2. Step 2: Convert to fraction form
    806,718,908.80/1,210,078,363.20 = 788,803,004.80/x
  3. Step 3: Cross multiply
    806,718,908.80x = 1,210,078,363.20 × 788,803,004.80
  4. Step 4: Simplify right side
    806,718,908.80x = 954,513,448,935,625,728
  5. Step 5: Solve for x
    x = 954,513,448,935,625,728/806,718,908.80
  6. Step 6: Final answer
    x = 1,183,204,507.20

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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.