Home / 638,139.85-957,209.78-401,943.85

Finding the Fourth Proportional to 638,139.85, 957,209.78 and 401,943.85

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Solution

The fourth proportional to 638,139.85, 957,209.78 and 401,943.85 is: 602,915.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,139.85 : 957,209.78 = 401,943.85 : x
  2. Step 2: Convert to fraction form
    638,139.85/957,209.78 = 401,943.85/x
  3. Step 3: Cross multiply
    638,139.85x = 957,209.78 × 401,943.85
  4. Step 4: Simplify right side
    638,139.85x = 384,744,582,221.13
  5. Step 5: Solve for x
    x = 384,744,582,221.13/638,139.85
  6. Step 6: Final answer
    x = 602,915.78

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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.