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Finding the Fourth Proportional to 1,208,936.04, 1,668,265.83 and 664,984.01

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Solution

The fourth proportional to 1,208,936.04, 1,668,265.83 and 664,984.01 is: 917,641.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,936.04 : 1,668,265.83 = 664,984.01 : x
  2. Step 2: Convert to fraction form
    1,208,936.04/1,668,265.83 = 664,984.01/x
  3. Step 3: Cross multiply
    1,208,936.04x = 1,668,265.83 × 664,984.01
  4. Step 4: Simplify right side
    1,208,936.04x = 1,109,370,093,038.05
  5. Step 5: Solve for x
    x = 1,109,370,093,038.05/1,208,936.04
  6. Step 6: Final answer
    x = 917,641.68

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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.