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Finding the Fourth Proportional to 716,098.69, 988,196.48 and 393,808.78

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Solution

The fourth proportional to 716,098.69, 988,196.48 and 393,808.78 is: 543,445.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,098.69 : 988,196.48 = 393,808.78 : x
  2. Step 2: Convert to fraction form
    716,098.69/988,196.48 = 393,808.78/x
  3. Step 3: Cross multiply
    716,098.69x = 988,196.48 × 393,808.78
  4. Step 4: Simplify right side
    716,098.69x = 389,160,450,189.09
  5. Step 5: Solve for x
    x = 389,160,450,189.09/716,098.69
  6. Step 6: Final answer
    x = 543,445.28

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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.