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Finding the Fourth Proportional to 1,939,905.90, 2,910,211.71 and 660,447.90

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Solution

The fourth proportional to 1,939,905.90, 2,910,211.71 and 660,447.90 is: 990,791.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939,905.90 : 2,910,211.71 = 660,447.90 : x
  2. Step 2: Convert to fraction form
    1,939,905.90/2,910,211.71 = 660,447.90/x
  3. Step 3: Cross multiply
    1,939,905.90x = 2,910,211.71 × 660,447.90
  4. Step 4: Simplify right side
    1,939,905.90x = 1,922,043,212,424.91
  5. Step 5: Solve for x
    x = 1,922,043,212,424.91/1,939,905.90
  6. Step 6: Final answer
    x = 990,791.98

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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.