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Finding the Fourth Proportional to 668,111.49, 921,954.15 and 396,205.02

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Solution

The fourth proportional to 668,111.49, 921,954.15 and 396,205.02 is: 546,739.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,111.49 : 921,954.15 = 396,205.02 : x
  2. Step 2: Convert to fraction form
    668,111.49/921,954.15 = 396,205.02/x
  3. Step 3: Cross multiply
    668,111.49x = 921,954.15 × 396,205.02
  4. Step 4: Simplify right side
    668,111.49x = 365,282,862,439.83
  5. Step 5: Solve for x
    x = 365,282,862,439.83/668,111.49
  6. Step 6: Final answer
    x = 546,739.38

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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.