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Finding the Fourth Proportional to 326,017.20, 489,025.80 and 139,047.60

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Solution

The fourth proportional to 326,017.20, 489,025.80 and 139,047.60 is: 208,571.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,017.20 : 489,025.80 = 139,047.60 : x
  2. Step 2: Convert to fraction form
    326,017.20/489,025.80 = 139,047.60/x
  3. Step 3: Cross multiply
    326,017.20x = 489,025.80 × 139,047.60
  4. Step 4: Simplify right side
    326,017.20x = 67,997,863,828.08
  5. Step 5: Solve for x
    x = 67,997,863,828.08/326,017.20
  6. Step 6: Final answer
    x = 208,571.40

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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.