Home / 638,066.20-880,519.26-351,612.76

Finding the Fourth Proportional to 638,066.20, 880,519.26 and 351,612.76

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Solution

The fourth proportional to 638,066.20, 880,519.26 and 351,612.76 is: 485,218.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,066.20 : 880,519.26 = 351,612.76 : x
  2. Step 2: Convert to fraction form
    638,066.20/880,519.26 = 351,612.76/x
  3. Step 3: Cross multiply
    638,066.20x = 880,519.26 × 351,612.76
  4. Step 4: Simplify right side
    638,066.20x = 309,601,807,241.76
  5. Step 5: Solve for x
    x = 309,601,807,241.76/638,066.20
  6. Step 6: Final answer
    x = 485,218.94

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.