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Finding the Fourth Proportional to 668,111.28, 922,031.28 and 396,340.08

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Solution

The fourth proportional to 668,111.28, 922,031.28 and 396,340.08 is: 546,971.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,111.28 : 922,031.28 = 396,340.08 : x
  2. Step 2: Convert to fraction form
    668,111.28/922,031.28 = 396,340.08/x
  3. Step 3: Cross multiply
    668,111.28x = 922,031.28 × 396,340.08
  4. Step 4: Simplify right side
    668,111.28x = 365,437,951,277.70
  5. Step 5: Solve for x
    x = 365,437,951,277.70/668,111.28
  6. Step 6: Final answer
    x = 546,971.68

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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.