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Finding the Fourth Proportional to 326,359.28, 489,449.76 and 89,645.60

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Solution

The fourth proportional to 326,359.28, 489,449.76 and 89,645.60 is: 134,443.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,359.28 : 489,449.76 = 89,645.60 : x
  2. Step 2: Convert to fraction form
    326,359.28/489,449.76 = 89,645.60/x
  3. Step 3: Cross multiply
    326,359.28x = 489,449.76 × 89,645.60
  4. Step 4: Simplify right side
    326,359.28x = 43,877,017,405.06
  5. Step 5: Solve for x
    x = 43,877,017,405.06/326,359.28
  6. Step 6: Final answer
    x = 134,443.91

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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.