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Finding the Fourth Proportional to 326,081.60, 489,122.40 and 148,934.60

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Solution

The fourth proportional to 326,081.60, 489,122.40 and 148,934.60 is: 223,401.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,081.60 : 489,122.40 = 148,934.60 : x
  2. Step 2: Convert to fraction form
    326,081.60/489,122.40 = 148,934.60/x
  3. Step 3: Cross multiply
    326,081.60x = 489,122.40 × 148,934.60
  4. Step 4: Simplify right side
    326,081.60x = 72,847,248,995.04
  5. Step 5: Solve for x
    x = 72,847,248,995.04/326,081.60
  6. Step 6: Final answer
    x = 223,401.90

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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.