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Finding the Fourth Proportional to 656,440.70, 905,888.25 and 354,634.70

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Solution

The fourth proportional to 656,440.70, 905,888.25 and 354,634.70 is: 489,395.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,440.70 : 905,888.25 = 354,634.70 : x
  2. Step 2: Convert to fraction form
    656,440.70/905,888.25 = 354,634.70/x
  3. Step 3: Cross multiply
    656,440.70x = 905,888.25 × 354,634.70
  4. Step 4: Simplify right side
    656,440.70x = 321,259,403,242.83
  5. Step 5: Solve for x
    x = 321,259,403,242.83/656,440.70
  6. Step 6: Final answer
    x = 489,395.93

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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.