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Finding the Fourth Proportional to 691,999.68, 954,972 and 405,600.96

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Solution

The fourth proportional to 691,999.68, 954,972 and 405,600.96 is: 559,736.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,999.68 : 954,972 = 405,600.96 : x
  2. Step 2: Convert to fraction form
    691,999.68/954,972 = 405,600.96/x
  3. Step 3: Cross multiply
    691,999.68x = 954,972 × 405,600.96
  4. Step 4: Simplify right side
    691,999.68x = 387,337,559,973.12
  5. Step 5: Solve for x
    x = 387,337,559,973.12/691,999.68
  6. Step 6: Final answer
    x = 559,736.62

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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.