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Finding the Fourth Proportional to 326,628, 489,972.92 and 126,963.81

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Solution

The fourth proportional to 326,628, 489,972.92 and 126,963.81 is: 190,457.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,628 : 489,972.92 = 126,963.81 : x
  2. Step 2: Convert to fraction form
    326,628/489,972.92 = 126,963.81/x
  3. Step 3: Cross multiply
    326,628x = 489,972.92 × 126,963.81
  4. Step 4: Simplify right side
    326,628x = 62,208,828,085.21
  5. Step 5: Solve for x
    x = 62,208,828,085.21/326,628
  6. Step 6: Final answer
    x = 190,457.73

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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.