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Finding the Fourth Proportional to 296,979.80, 445,571.70 and 86,648.60

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Solution

The fourth proportional to 296,979.80, 445,571.70 and 86,648.60 is: 130,002.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,979.80 : 445,571.70 = 86,648.60 : x
  2. Step 2: Convert to fraction form
    296,979.80/445,571.70 = 86,648.60/x
  3. Step 3: Cross multiply
    296,979.80x = 445,571.70 × 86,648.60
  4. Step 4: Simplify right side
    296,979.80x = 38,608,164,004.62
  5. Step 5: Solve for x
    x = 38,608,164,004.62/296,979.80
  6. Step 6: Final answer
    x = 130,002.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.