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Finding the Fourth Proportional to 677,656.18, 935,008.54 and 405,620.65

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Solution

The fourth proportional to 677,656.18, 935,008.54 and 405,620.65 is: 559,662.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,656.18 : 935,008.54 = 405,620.65 : x
  2. Step 2: Convert to fraction form
    677,656.18/935,008.54 = 405,620.65/x
  3. Step 3: Cross multiply
    677,656.18x = 935,008.54 × 405,620.65
  4. Step 4: Simplify right side
    677,656.18x = 379,258,771,750.35
  5. Step 5: Solve for x
    x = 379,258,771,750.35/677,656.18
  6. Step 6: Final answer
    x = 559,662.53

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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.