Home / 638,945.20-958,417.80-195,655.60

Finding the Fourth Proportional to 638,945.20, 958,417.80 and 195,655.60

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Solution

The fourth proportional to 638,945.20, 958,417.80 and 195,655.60 is: 293,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,945.20 : 958,417.80 = 195,655.60 : x
  2. Step 2: Convert to fraction form
    638,945.20/958,417.80 = 195,655.60/x
  3. Step 3: Cross multiply
    638,945.20x = 958,417.80 × 195,655.60
  4. Step 4: Simplify right side
    638,945.20x = 187,519,809,709.68
  5. Step 5: Solve for x
    x = 187,519,809,709.68/638,945.20
  6. Step 6: Final answer
    x = 293,483.40

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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.