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Finding the Fourth Proportional to 496,970.61, 685,639.35 and 281,986.17

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Solution

The fourth proportional to 496,970.61, 685,639.35 and 281,986.17 is: 389,038.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,970.61 : 685,639.35 = 281,986.17 : x
  2. Step 2: Convert to fraction form
    496,970.61/685,639.35 = 281,986.17/x
  3. Step 3: Cross multiply
    496,970.61x = 685,639.35 × 281,986.17
  4. Step 4: Simplify right side
    496,970.61x = 193,340,814,307.79
  5. Step 5: Solve for x
    x = 193,340,814,307.79/496,970.61
  6. Step 6: Final answer
    x = 389,038.73

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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.