Home / 789,488.76-1,089,493.68-426,911.70

Finding the Fourth Proportional to 789,488.76, 1,089,493.68 and 426,911.70

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Solution

The fourth proportional to 789,488.76, 1,089,493.68 and 426,911.70 is: 589,137.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,488.76 : 1,089,493.68 = 426,911.70 : x
  2. Step 2: Convert to fraction form
    789,488.76/1,089,493.68 = 426,911.70/x
  3. Step 3: Cross multiply
    789,488.76x = 1,089,493.68 × 426,911.70
  4. Step 4: Simplify right side
    789,488.76x = 465,117,599,068.06
  5. Step 5: Solve for x
    x = 465,117,599,068.06/789,488.76
  6. Step 6: Final answer
    x = 589,137.71

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Double scale
Find fourth proportional to 789,489.76, 1,089,495.06 and 426,912.70
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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.