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Finding the Fourth Proportional to 326,703.60, 489,399.30 and 220,415.40

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Solution

The fourth proportional to 326,703.60, 489,399.30 and 220,415.40 is: 330,180.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,703.60 : 489,399.30 = 220,415.40 : x
  2. Step 2: Convert to fraction form
    326,703.60/489,399.30 = 220,415.40/x
  3. Step 3: Cross multiply
    326,703.60x = 489,399.30 × 220,415.40
  4. Step 4: Simplify right side
    326,703.60x = 107,871,142,469.22
  5. Step 5: Solve for x
    x = 107,871,142,469.22/326,703.60
  6. Step 6: Final answer
    x = 330,180.45

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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.