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Finding the Fourth Proportional to 678,881.88, 936,752.94 and 392,346.72

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Solution

The fourth proportional to 678,881.88, 936,752.94 and 392,346.72 is: 541,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,881.88 : 936,752.94 = 392,346.72 : x
  2. Step 2: Convert to fraction form
    678,881.88/936,752.94 = 392,346.72/x
  3. Step 3: Cross multiply
    678,881.88x = 936,752.94 × 392,346.72
  4. Step 4: Simplify right side
    678,881.88x = 367,531,943,459.36
  5. Step 5: Solve for x
    x = 367,531,943,459.36/678,881.88
  6. Step 6: Final answer
    x = 541,378.34

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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.