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Finding the Fourth Proportional to 691,998.71, 954,958.34 and 390,192.71

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Solution

The fourth proportional to 691,998.71, 954,958.34 and 390,192.71 is: 538,466.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,998.71 : 954,958.34 = 390,192.71 : x
  2. Step 2: Convert to fraction form
    691,998.71/954,958.34 = 390,192.71/x
  3. Step 3: Cross multiply
    691,998.71x = 954,958.34 × 390,192.71
  4. Step 4: Simplify right side
    691,998.71x = 372,617,778,822.39
  5. Step 5: Solve for x
    x = 372,617,778,822.39/691,998.71
  6. Step 6: Final answer
    x = 538,466.01

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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.