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Finding the Fourth Proportional to 716,097.69, 988,195.10 and 393,807.78

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Solution

The fourth proportional to 716,097.69, 988,195.10 and 393,807.78 is: 543,443.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,097.69 : 988,195.10 = 393,807.78 : x
  2. Step 2: Convert to fraction form
    716,097.69/988,195.10 = 393,807.78/x
  3. Step 3: Cross multiply
    716,097.69x = 988,195.10 × 393,807.78
  4. Step 4: Simplify right side
    716,097.69x = 389,158,920,667.28
  5. Step 5: Solve for x
    x = 389,158,920,667.28/716,097.69
  6. Step 6: Final answer
    x = 543,443.90

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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.