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Finding the Fourth Proportional to 713,907.81, 985,183.60 and 407,980.69

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Solution

The fourth proportional to 713,907.81, 985,183.60 and 407,980.69 is: 563,008.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,907.81 : 985,183.60 = 407,980.69 : x
  2. Step 2: Convert to fraction form
    713,907.81/985,183.60 = 407,980.69/x
  3. Step 3: Cross multiply
    713,907.81x = 985,183.60 × 407,980.69
  4. Step 4: Simplify right side
    713,907.81x = 401,935,884,904.68
  5. Step 5: Solve for x
    x = 401,935,884,904.68/713,907.81
  6. Step 6: Final answer
    x = 563,008.11

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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.