Home / 685,145.70-1,027,718.55-330,195.60

Finding the Fourth Proportional to 685,145.70, 1,027,718.55 and 330,195.60

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Solution

The fourth proportional to 685,145.70, 1,027,718.55 and 330,195.60 is: 495,293.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,145.70 : 1,027,718.55 = 330,195.60 : x
  2. Step 2: Convert to fraction form
    685,145.70/1,027,718.55 = 330,195.60/x
  3. Step 3: Cross multiply
    685,145.70x = 1,027,718.55 × 330,195.60
  4. Step 4: Simplify right side
    685,145.70x = 339,348,143,248.38
  5. Step 5: Solve for x
    x = 339,348,143,248.38/685,145.70
  6. Step 6: Final answer
    x = 495,293.40

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Double scale
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Similar ratio
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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.