Home / 642,078.30-962,890.65-221,256.30

Finding the Fourth Proportional to 642,078.30, 962,890.65 and 221,256.30

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Solution

The fourth proportional to 642,078.30, 962,890.65 and 221,256.30 is: 331,806.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,078.30 : 962,890.65 = 221,256.30 : x
  2. Step 2: Convert to fraction form
    642,078.30/962,890.65 = 221,256.30/x
  3. Step 3: Cross multiply
    642,078.30x = 962,890.65 × 221,256.30
  4. Step 4: Simplify right side
    642,078.30x = 213,045,622,523.60
  5. Step 5: Solve for x
    x = 213,045,622,523.60/642,078.30
  6. Step 6: Final answer
    x = 331,806.30

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1.5x scale

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.