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Finding the Fourth Proportional to 1,611,569.68, 2,223,922.48 and 913,978.54

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Solution

The fourth proportional to 1,611,569.68, 2,223,922.48 and 913,978.54 is: 1,261,265.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611,569.68 : 2,223,922.48 = 913,978.54 : x
  2. Step 2: Convert to fraction form
    1,611,569.68/2,223,922.48 = 913,978.54/x
  3. Step 3: Cross multiply
    1,611,569.68x = 2,223,922.48 × 913,978.54
  4. Step 4: Simplify right side
    1,611,569.68x = 2,032,617,421,343.58
  5. Step 5: Solve for x
    x = 2,032,617,421,343.58/1,611,569.68
  6. Step 6: Final answer
    x = 1,261,265.61

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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.