Home / 638,183.46-880,688.76-351,703.78

Finding the Fourth Proportional to 638,183.46, 880,688.76 and 351,703.78

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Solution

The fourth proportional to 638,183.46, 880,688.76 and 351,703.78 is: 485,348.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,183.46 : 880,688.76 = 351,703.78 : x
  2. Step 2: Convert to fraction form
    638,183.46/880,688.76 = 351,703.78/x
  3. Step 3: Cross multiply
    638,183.46x = 880,688.76 × 351,703.78
  4. Step 4: Simplify right side
    638,183.46x = 309,741,565,895.51
  5. Step 5: Solve for x
    x = 309,741,565,895.51/638,183.46
  6. Step 6: Final answer
    x = 485,348.78

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