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Finding the Fourth Proportional to 1,423,486.03, 1,964,410.71 and 778,906.22

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Solution

The fourth proportional to 1,423,486.03, 1,964,410.71 and 778,906.22 is: 1,074,890.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423,486.03 : 1,964,410.71 = 778,906.22 : x
  2. Step 2: Convert to fraction form
    1,423,486.03/1,964,410.71 = 778,906.22/x
  3. Step 3: Cross multiply
    1,423,486.03x = 1,964,410.71 × 778,906.22
  4. Step 4: Simplify right side
    1,423,486.03x = 1,530,091,720,653.62
  5. Step 5: Solve for x
    x = 1,530,091,720,653.62/1,423,486.03
  6. Step 6: Final answer
    x = 1,074,890.58

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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.