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Finding the Fourth Proportional to 561,450.78, 774,881.10 and 357,436.53

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Solution

The fourth proportional to 561,450.78, 774,881.10 and 357,436.53 is: 493,312.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,450.78 : 774,881.10 = 357,436.53 : x
  2. Step 2: Convert to fraction form
    561,450.78/774,881.10 = 357,436.53/x
  3. Step 3: Cross multiply
    561,450.78x = 774,881.10 × 357,436.53
  4. Step 4: Simplify right side
    561,450.78x = 276,970,811,546.58
  5. Step 5: Solve for x
    x = 276,970,811,546.58/561,450.78
  6. Step 6: Final answer
    x = 493,312.72

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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.