Home / 1,433,901.78-1,978,840.80-789,381.90

Finding the Fourth Proportional to 1,433,901.78, 1,978,840.80 and 789,381.90

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Solution

The fourth proportional to 1,433,901.78, 1,978,840.80 and 789,381.90 is: 1,089,378.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,901.78 : 1,978,840.80 = 789,381.90 : x
  2. Step 2: Convert to fraction form
    1,433,901.78/1,978,840.80 = 789,381.90/x
  3. Step 3: Cross multiply
    1,433,901.78x = 1,978,840.80 × 789,381.90
  4. Step 4: Simplify right side
    1,433,901.78x = 1,562,061,110,501.52
  5. Step 5: Solve for x
    x = 1,562,061,110,501.52/1,433,901.78
  6. Step 6: Final answer
    x = 1,089,378.04

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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.