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Finding the Fourth Proportional to 668,733.06, 922,715.19 and 396,681.78

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Solution

The fourth proportional to 668,733.06, 922,715.19 and 396,681.78 is: 547,339.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,733.06 : 922,715.19 = 396,681.78 : x
  2. Step 2: Convert to fraction form
    668,733.06/922,715.19 = 396,681.78/x
  3. Step 3: Cross multiply
    668,733.06x = 922,715.19 × 396,681.78
  4. Step 4: Simplify right side
    668,733.06x = 366,024,304,002.24
  5. Step 5: Solve for x
    x = 366,024,304,002.24/668,733.06
  6. Step 6: Final answer
    x = 547,339.93

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Double scale
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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.