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Finding the Fourth Proportional to 716,049.06, 988,173.12 and 393,783.66

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Solution

The fourth proportional to 716,049.06, 988,173.12 and 393,783.66 is: 543,435.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,049.06 : 988,173.12 = 393,783.66 : x
  2. Step 2: Convert to fraction form
    716,049.06/988,173.12 = 393,783.66/x
  3. Step 3: Cross multiply
    716,049.06x = 988,173.12 × 393,783.66
  4. Step 4: Simplify right side
    716,049.06x = 389,126,427,907.22
  5. Step 5: Solve for x
    x = 389,126,427,907.22/716,049.06
  6. Step 6: Final answer
    x = 543,435.43

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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.