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Finding the Fourth Proportional to 326,069.60, 489,104.40 and 89,436.20

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Solution

The fourth proportional to 326,069.60, 489,104.40 and 89,436.20 is: 134,154.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,069.60 : 489,104.40 = 89,436.20 : x
  2. Step 2: Convert to fraction form
    326,069.60/489,104.40 = 89,436.20/x
  3. Step 3: Cross multiply
    326,069.60x = 489,104.40 × 89,436.20
  4. Step 4: Simplify right side
    326,069.60x = 43,743,638,939.28
  5. Step 5: Solve for x
    x = 43,743,638,939.28/326,069.60
  6. Step 6: Final answer
    x = 134,154.30

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1.5x scale

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.