Home / 789,445.49-1,089,167.18-643,999.85

Finding the Fourth Proportional to 789,445.49, 1,089,167.18 and 643,999.85

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Solution

The fourth proportional to 789,445.49, 1,089,167.18 and 643,999.85 is: 888,501.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,445.49 : 1,089,167.18 = 643,999.85 : x
  2. Step 2: Convert to fraction form
    789,445.49/1,089,167.18 = 643,999.85/x
  3. Step 3: Cross multiply
    789,445.49x = 1,089,167.18 × 643,999.85
  4. Step 4: Simplify right side
    789,445.49x = 701,423,500,544.92
  5. Step 5: Solve for x
    x = 701,423,500,544.92/789,445.49
  6. Step 6: Final answer
    x = 888,501.50

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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.