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Finding the Fourth Proportional to 1,212,891.90, 1,819,009.80 and 359,961.90

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Solution

The fourth proportional to 1,212,891.90, 1,819,009.80 and 359,961.90 is: 539,845.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,891.90 : 1,819,009.80 = 359,961.90 : x
  2. Step 2: Convert to fraction form
    1,212,891.90/1,819,009.80 = 359,961.90/x
  3. Step 3: Cross multiply
    1,212,891.90x = 1,819,009.80 × 359,961.90
  4. Step 4: Simplify right side
    1,212,891.90x = 654,774,223,726.62
  5. Step 5: Solve for x
    x = 654,774,223,726.62/1,212,891.90
  6. Step 6: Final answer
    x = 539,845.49

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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.