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Finding the Fourth Proportional to 1,212,961.20, 1,819,441.80 and 740,569.20

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Solution

The fourth proportional to 1,212,961.20, 1,819,441.80 and 740,569.20 is: 1,110,853.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,961.20 : 1,819,441.80 = 740,569.20 : x
  2. Step 2: Convert to fraction form
    1,212,961.20/1,819,441.80 = 740,569.20/x
  3. Step 3: Cross multiply
    1,212,961.20x = 1,819,441.80 × 740,569.20
  4. Step 4: Simplify right side
    1,212,961.20x = 1,347,422,558,272.56
  5. Step 5: Solve for x
    x = 1,347,422,558,272.56/1,212,961.20
  6. Step 6: Final answer
    x = 1,110,853.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.