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Finding the Fourth Proportional to 806,447.80, 1,210,327.80 and 780,203.80

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Solution

The fourth proportional to 806,447.80, 1,210,327.80 and 780,203.80 is: 1,170,940.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,447.80 : 1,210,327.80 = 780,203.80 : x
  2. Step 2: Convert to fraction form
    806,447.80/1,210,327.80 = 780,203.80/x
  3. Step 3: Cross multiply
    806,447.80x = 1,210,327.80 × 780,203.80
  4. Step 4: Simplify right side
    806,447.80x = 944,302,348,805.64
  5. Step 5: Solve for x
    x = 944,302,348,805.64/806,447.80
  6. Step 6: Final answer
    x = 1,170,940.45

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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.