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Finding the Fourth Proportional to 716,047.73, 988,153.13 and 393,760.21

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Solution

The fourth proportional to 716,047.73, 988,153.13 and 393,760.21 is: 543,393.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,047.73 : 988,153.13 = 393,760.21 : x
  2. Step 2: Convert to fraction form
    716,047.73/988,153.13 = 393,760.21/x
  3. Step 3: Cross multiply
    716,047.73x = 988,153.13 × 393,760.21
  4. Step 4: Simplify right side
    716,047.73x = 389,095,377,071.39
  5. Step 5: Solve for x
    x = 389,095,377,071.39/716,047.73
  6. Step 6: Final answer
    x = 543,393.07

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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.