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Finding the Fourth Proportional to 691,457.96, 954,142.26 and 385,505.57

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Solution

The fourth proportional to 691,457.96, 954,142.26 and 385,505.57 is: 531,958.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,457.96 : 954,142.26 = 385,505.57 : x
  2. Step 2: Convert to fraction form
    691,457.96/954,142.26 = 385,505.57/x
  3. Step 3: Cross multiply
    691,457.96x = 954,142.26 × 385,505.57
  4. Step 4: Simplify right side
    691,457.96x = 367,827,155,802.39
  5. Step 5: Solve for x
    x = 367,827,155,802.39/691,457.96
  6. Step 6: Final answer
    x = 531,958.81

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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.