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Finding the Fourth Proportional to 638,016.81, 880,502.39 and 351,536.82

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Solution

The fourth proportional to 638,016.81, 880,502.39 and 351,536.82 is: 485,142.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,016.81 : 880,502.39 = 351,536.82 : x
  2. Step 2: Convert to fraction form
    638,016.81/880,502.39 = 351,536.82/x
  3. Step 3: Cross multiply
    638,016.81x = 880,502.39 × 351,536.82
  4. Step 4: Simplify right side
    638,016.81x = 309,529,010,183.00
  5. Step 5: Solve for x
    x = 309,529,010,183.00/638,016.81
  6. Step 6: Final answer
    x = 485,142.41

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Double scale
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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.