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Finding the Fourth Proportional to 870,992.46, 1,201,969.58 and 489,027.46

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Solution

The fourth proportional to 870,992.46, 1,201,969.58 and 489,027.46 is: 674,857.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,992.46 : 1,201,969.58 = 489,027.46 : x
  2. Step 2: Convert to fraction form
    870,992.46/1,201,969.58 = 489,027.46/x
  3. Step 3: Cross multiply
    870,992.46x = 1,201,969.58 × 489,027.46
  4. Step 4: Simplify right side
    870,992.46x = 587,796,130,704.67
  5. Step 5: Solve for x
    x = 587,796,130,704.67/870,992.46
  6. Step 6: Final answer
    x = 674,857.89

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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.