Home / 685,417.46-1,028,286.60-212,077.76

Finding the Fourth Proportional to 685,417.46, 1,028,286.60 and 212,077.76

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Solution

The fourth proportional to 685,417.46, 1,028,286.60 and 212,077.76 is: 318,166.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,417.46 : 1,028,286.60 = 212,077.76 : x
  2. Step 2: Convert to fraction form
    685,417.46/1,028,286.60 = 212,077.76/x
  3. Step 3: Cross multiply
    685,417.46x = 1,028,286.60 × 212,077.76
  4. Step 4: Simplify right side
    685,417.46x = 218,076,718,766.02
  5. Step 5: Solve for x
    x = 218,076,718,766.02/685,417.46
  6. Step 6: Final answer
    x = 318,166.27

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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.