Home / 643,756.22-887,766.45-385,591.94

Finding the Fourth Proportional to 643,756.22, 887,766.45 and 385,591.94

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Solution

The fourth proportional to 643,756.22, 887,766.45 and 385,591.94 is: 531,747.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,756.22 : 887,766.45 = 385,591.94 : x
  2. Step 2: Convert to fraction form
    643,756.22/887,766.45 = 385,591.94/x
  3. Step 3: Cross multiply
    643,756.22x = 887,766.45 × 385,591.94
  4. Step 4: Simplify right side
    643,756.22x = 342,315,587,722.41
  5. Step 5: Solve for x
    x = 342,315,587,722.41/643,756.22
  6. Step 6: Final answer
    x = 531,747.23

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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.