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Finding the Fourth Proportional to 326,087.40, 489,131.10 and 148,940.40

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Solution

The fourth proportional to 326,087.40, 489,131.10 and 148,940.40 is: 223,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,087.40 : 489,131.10 = 148,940.40 : x
  2. Step 2: Convert to fraction form
    326,087.40/489,131.10 = 148,940.40/x
  3. Step 3: Cross multiply
    326,087.40x = 489,131.10 × 148,940.40
  4. Step 4: Simplify right side
    326,087.40x = 72,851,381,686.44
  5. Step 5: Solve for x
    x = 72,851,381,686.44/326,087.40
  6. Step 6: Final answer
    x = 223,410.60

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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.