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Finding the Fourth Proportional to 326,357.28, 489,446.76 and 89,643.60

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Solution

The fourth proportional to 326,357.28, 489,446.76 and 89,643.60 is: 134,440.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,357.28 : 489,446.76 = 89,643.60 : x
  2. Step 2: Convert to fraction form
    326,357.28/489,446.76 = 89,643.60/x
  3. Step 3: Cross multiply
    326,357.28x = 489,446.76 × 89,643.60
  4. Step 4: Simplify right side
    326,357.28x = 43,875,769,574.74
  5. Step 5: Solve for x
    x = 43,875,769,574.74/326,357.28
  6. Step 6: Final answer
    x = 134,440.91

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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.