Home / 789,444.99-1,089,166.49-643,999.35

Finding the Fourth Proportional to 789,444.99, 1,089,166.49 and 643,999.35

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Solution

The fourth proportional to 789,444.99, 1,089,166.49 and 643,999.35 is: 888,500.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,444.99 : 1,089,166.49 = 643,999.35 : x
  2. Step 2: Convert to fraction form
    789,444.99/1,089,166.49 = 643,999.35/x
  3. Step 3: Cross multiply
    789,444.99x = 1,089,166.49 × 643,999.35
  4. Step 4: Simplify right side
    789,444.99x = 701,422,508,381.79
  5. Step 5: Solve for x
    x = 701,422,508,381.79/789,444.99
  6. Step 6: Final answer
    x = 888,500.80

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1.5x scale

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.