Home / 685,918.18-946,362.12-443,817.28

Finding the Fourth Proportional to 685,918.18, 946,362.12 and 443,817.28

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Solution

The fourth proportional to 685,918.18, 946,362.12 and 443,817.28 is: 612,335.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,918.18 : 946,362.12 = 443,817.28 : x
  2. Step 2: Convert to fraction form
    685,918.18/946,362.12 = 443,817.28/x
  3. Step 3: Cross multiply
    685,918.18x = 946,362.12 × 443,817.28
  4. Step 4: Simplify right side
    685,918.18x = 420,011,861,993.43
  5. Step 5: Solve for x
    x = 420,011,861,993.43/685,918.18
  6. Step 6: Final answer
    x = 612,335.22

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1.5x scale

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.