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Finding the Fourth Proportional to 682,920.79, 942,405.99 and 376,990.60

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Solution

The fourth proportional to 682,920.79, 942,405.99 and 376,990.60 is: 520,233.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    682,920.79 : 942,405.99 = 376,990.60 : x
  2. Step 2: Convert to fraction form
    682,920.79/942,405.99 = 376,990.60/x
  3. Step 3: Cross multiply
    682,920.79x = 942,405.99 × 376,990.60
  4. Step 4: Simplify right side
    682,920.79x = 355,278,200,555.99
  5. Step 5: Solve for x
    x = 355,278,200,555.99/682,920.79
  6. Step 6: Final answer
    x = 520,233.40

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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.