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Finding the Fourth Proportional to 1,434,665.54, 1,979,762.64 and 822,786.68

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Solution

The fourth proportional to 1,434,665.54, 1,979,762.64 and 822,786.68 is: 1,135,402.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434,665.54 : 1,979,762.64 = 822,786.68 : x
  2. Step 2: Convert to fraction form
    1,434,665.54/1,979,762.64 = 822,786.68/x
  3. Step 3: Cross multiply
    1,434,665.54x = 1,979,762.64 × 822,786.68
  4. Step 4: Simplify right side
    1,434,665.54x = 1,628,922,329,753.64
  5. Step 5: Solve for x
    x = 1,628,922,329,753.64/1,434,665.54
  6. Step 6: Final answer
    x = 1,135,402.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.