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Finding the Fourth Proportional to 789,339.68, 1,089,266.64 and 431,636

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Solution

The fourth proportional to 789,339.68, 1,089,266.64 and 431,636 is: 595,645.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,339.68 : 1,089,266.64 = 431,636 : x
  2. Step 2: Convert to fraction form
    789,339.68/1,089,266.64 = 431,636/x
  3. Step 3: Cross multiply
    789,339.68x = 1,089,266.64 × 431,636
  4. Step 4: Simplify right side
    789,339.68x = 470,166,695,423.04
  5. Step 5: Solve for x
    x = 470,166,695,423.04/789,339.68
  6. Step 6: Final answer
    x = 595,645.58

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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.