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Finding the Fourth Proportional to 489,629.38, 675,693.21 and 285,807.46

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Solution

The fourth proportional to 489,629.38, 675,693.21 and 285,807.46 is: 394,417.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,629.38 : 675,693.21 = 285,807.46 : x
  2. Step 2: Convert to fraction form
    489,629.38/675,693.21 = 285,807.46/x
  3. Step 3: Cross multiply
    489,629.38x = 675,693.21 × 285,807.46
  4. Step 4: Simplify right side
    489,629.38x = 193,118,160,089.35
  5. Step 5: Solve for x
    x = 193,118,160,089.35/489,629.38
  6. Step 6: Final answer
    x = 394,417.02

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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.