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Finding the Fourth Proportional to 678,775.10, 936,655.01 and 392,313.74

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Solution

The fourth proportional to 678,775.10, 936,655.01 and 392,313.74 is: 541,361.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,775.10 : 936,655.01 = 392,313.74 : x
  2. Step 2: Convert to fraction form
    678,775.10/936,655.01 = 392,313.74/x
  3. Step 3: Cross multiply
    678,775.10x = 936,655.01 × 392,313.74
  4. Step 4: Simplify right side
    678,775.10x = 367,462,628,101.27
  5. Step 5: Solve for x
    x = 367,462,628,101.27/678,775.10
  6. Step 6: Final answer
    x = 541,361.38

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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.