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Finding the Fourth Proportional to 326,079.60, 489,119.40 and 297,211.20

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Solution

The fourth proportional to 326,079.60, 489,119.40 and 297,211.20 is: 445,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,079.60 : 489,119.40 = 297,211.20 : x
  2. Step 2: Convert to fraction form
    326,079.60/489,119.40 = 297,211.20/x
  3. Step 3: Cross multiply
    326,079.60x = 489,119.40 × 297,211.20
  4. Step 4: Simplify right side
    326,079.60x = 145,371,763,817.28
  5. Step 5: Solve for x
    x = 145,371,763,817.28/326,079.60
  6. Step 6: Final answer
    x = 445,816.80

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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.