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Finding the Fourth Proportional to 326,020.40, 489,030.60 and 220,266.80

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Solution

The fourth proportional to 326,020.40, 489,030.60 and 220,266.80 is: 330,400.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,020.40 : 489,030.60 = 220,266.80 : x
  2. Step 2: Convert to fraction form
    326,020.40/489,030.60 = 220,266.80/x
  3. Step 3: Cross multiply
    326,020.40x = 489,030.60 × 220,266.80
  4. Step 4: Simplify right side
    326,020.40x = 107,717,205,364.08
  5. Step 5: Solve for x
    x = 107,717,205,364.08/326,020.40
  6. Step 6: Final answer
    x = 330,400.20

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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.