Home / 685,640.40-946,236.24-395,299.20

Finding the Fourth Proportional to 685,640.40, 946,236.24 and 395,299.20

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Solution

The fourth proportional to 685,640.40, 946,236.24 and 395,299.20 is: 545,543.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,640.40 : 946,236.24 = 395,299.20 : x
  2. Step 2: Convert to fraction form
    685,640.40/946,236.24 = 395,299.20/x
  3. Step 3: Cross multiply
    685,640.40x = 946,236.24 × 395,299.20
  4. Step 4: Simplify right side
    685,640.40x = 374,046,428,683.01
  5. Step 5: Solve for x
    x = 374,046,428,683.01/685,640.40
  6. Step 6: Final answer
    x = 545,543.16

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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.