Home / 645,128.40-967,231.80-289,851.60

Finding the Fourth Proportional to 645,128.40, 967,231.80 and 289,851.60

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Solution

The fourth proportional to 645,128.40, 967,231.80 and 289,851.60 is: 434,570.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,128.40 : 967,231.80 = 289,851.60 : x
  2. Step 2: Convert to fraction form
    645,128.40/967,231.80 = 289,851.60/x
  3. Step 3: Cross multiply
    645,128.40x = 967,231.80 × 289,851.60
  4. Step 4: Simplify right side
    645,128.40x = 280,353,684,800.88
  5. Step 5: Solve for x
    x = 280,353,684,800.88/645,128.40
  6. Step 6: Final answer
    x = 434,570.37

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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.