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Finding the Fourth Proportional to 326,427.60, 489,612.60 and 89,749.20

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Solution

The fourth proportional to 326,427.60, 489,612.60 and 89,749.20 is: 134,615.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,427.60 : 489,612.60 = 89,749.20 : x
  2. Step 2: Convert to fraction form
    326,427.60/489,612.60 = 89,749.20/x
  3. Step 3: Cross multiply
    326,427.60x = 489,612.60 × 89,749.20
  4. Step 4: Simplify right side
    326,427.60x = 43,942,339,159.92
  5. Step 5: Solve for x
    x = 43,942,339,159.92/326,427.60
  6. Step 6: Final answer
    x = 134,615.88

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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.