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Finding the Fourth Proportional to 1,423,643.06, 1,964,579.64 and 779,020.04

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Solution

The fourth proportional to 1,423,643.06, 1,964,579.64 and 779,020.04 is: 1,075,021.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423,643.06 : 1,964,579.64 = 779,020.04 : x
  2. Step 2: Convert to fraction form
    1,423,643.06/1,964,579.64 = 779,020.04/x
  3. Step 3: Cross multiply
    1,423,643.06x = 1,964,579.64 × 779,020.04
  4. Step 4: Simplify right side
    1,423,643.06x = 1,530,446,909,735.99
  5. Step 5: Solve for x
    x = 1,530,446,909,735.99/1,423,643.06
  6. Step 6: Final answer
    x = 1,075,021.51

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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.