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Finding the Fourth Proportional to 1,216,909, 1,679,268.48 and 673,013.04

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Solution

The fourth proportional to 1,216,909, 1,679,268.48 and 673,013.04 is: 928,721.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,909 : 1,679,268.48 = 673,013.04 : x
  2. Step 2: Convert to fraction form
    1,216,909/1,679,268.48 = 673,013.04/x
  3. Step 3: Cross multiply
    1,216,909x = 1,679,268.48 × 673,013.04
  4. Step 4: Simplify right side
    1,216,909x = 1,130,169,584,700.98
  5. Step 5: Solve for x
    x = 1,130,169,584,700.98/1,216,909
  6. Step 6: Final answer
    x = 928,721.53

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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.