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Finding the Fourth Proportional to 326,110.20, 489,165.30 and 139,486.20

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Solution

The fourth proportional to 326,110.20, 489,165.30 and 139,486.20 is: 209,229.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,110.20 : 489,165.30 = 139,486.20 : x
  2. Step 2: Convert to fraction form
    326,110.20/489,165.30 = 139,486.20/x
  3. Step 3: Cross multiply
    326,110.20x = 489,165.30 × 139,486.20
  4. Step 4: Simplify right side
    326,110.20x = 68,231,808,868.86
  5. Step 5: Solve for x
    x = 68,231,808,868.86/326,110.20
  6. Step 6: Final answer
    x = 209,229.30

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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.