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Finding the Fourth Proportional to 713,708.92, 984,930.94 and 391,416.20

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Solution

The fourth proportional to 713,708.92, 984,930.94 and 391,416.20 is: 540,161.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,708.92 : 984,930.94 = 391,416.20 : x
  2. Step 2: Convert to fraction form
    713,708.92/984,930.94 = 391,416.20/x
  3. Step 3: Cross multiply
    713,708.92x = 984,930.94 × 391,416.20
  4. Step 4: Simplify right side
    713,708.92x = 385,517,925,055.34
  5. Step 5: Solve for x
    x = 385,517,925,055.34/713,708.92
  6. Step 6: Final answer
    x = 540,161.28

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Double scale
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Similar ratio
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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.