Home / 1,089,809.40-1,634,519.70-689,734.20

Finding the Fourth Proportional to 1,089,809.40, 1,634,519.70 and 689,734.20

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Solution

The fourth proportional to 1,089,809.40, 1,634,519.70 and 689,734.20 is: 1,034,478.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089,809.40 : 1,634,519.70 = 689,734.20 : x
  2. Step 2: Convert to fraction form
    1,089,809.40/1,634,519.70 = 689,734.20/x
  3. Step 3: Cross multiply
    1,089,809.40x = 1,634,519.70 × 689,734.20
  4. Step 4: Simplify right side
    1,089,809.40x = 1,127,384,137,663.74
  5. Step 5: Solve for x
    x = 1,127,384,137,663.74/1,089,809.40
  6. Step 6: Final answer
    x = 1,034,478.27

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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.