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Finding the Fourth Proportional to 678,773.66, 936,653.02 and 392,312.30

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Solution

The fourth proportional to 678,773.66, 936,653.02 and 392,312.30 is: 541,359.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,773.66 : 936,653.02 = 392,312.30 : x
  2. Step 2: Convert to fraction form
    678,773.66/936,653.02 = 392,312.30/x
  3. Step 3: Cross multiply
    678,773.66x = 936,653.02 × 392,312.30
  4. Step 4: Simplify right side
    678,773.66x = 367,460,500,578.15
  5. Step 5: Solve for x
    x = 367,460,500,578.15/678,773.66
  6. Step 6: Final answer
    x = 541,359.40

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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.