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Finding the Fourth Proportional to 678,774.60, 936,654.32 and 392,313.24

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Solution

The fourth proportional to 678,774.60, 936,654.32 and 392,313.24 is: 541,360.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,774.60 : 936,654.32 = 392,313.24 : x
  2. Step 2: Convert to fraction form
    678,774.60/936,654.32 = 392,313.24/x
  3. Step 3: Cross multiply
    678,774.60x = 936,654.32 × 392,313.24
  4. Step 4: Simplify right side
    678,774.60x = 367,461,889,077.63
  5. Step 5: Solve for x
    x = 367,461,889,077.63/678,774.60
  6. Step 6: Final answer
    x = 541,360.69

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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.