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Finding the Fourth Proportional to 1,209,222, 1,668,727.98 and 672,678

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Solution

The fourth proportional to 1,209,222, 1,668,727.98 and 672,678 is: 928,296.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,222 : 1,668,727.98 = 672,678 : x
  2. Step 2: Convert to fraction form
    1,209,222/1,668,727.98 = 672,678/x
  3. Step 3: Cross multiply
    1,209,222x = 1,668,727.98 × 672,678
  4. Step 4: Simplify right side
    1,209,222x = 1,122,516,600,130.44
  5. Step 5: Solve for x
    x = 1,122,516,600,130.44/1,209,222
  6. Step 6: Final answer
    x = 928,296.54

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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.