Home / 687,846.40-1,030,131.20-422,425.60

Finding the Fourth Proportional to 687,846.40, 1,030,131.20 and 422,425.60

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Solution

The fourth proportional to 687,846.40, 1,030,131.20 and 422,425.60 is: 632,632.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,846.40 : 1,030,131.20 = 422,425.60 : x
  2. Step 2: Convert to fraction form
    687,846.40/1,030,131.20 = 422,425.60/x
  3. Step 3: Cross multiply
    687,846.40x = 1,030,131.20 × 422,425.60
  4. Step 4: Simplify right side
    687,846.40x = 435,153,790,238.72
  5. Step 5: Solve for x
    x = 435,153,790,238.72/687,846.40
  6. Step 6: Final answer
    x = 632,632.21

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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.