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Finding the Fourth Proportional to 326,775.40, 489,968.70 and 169,311.40

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Solution

The fourth proportional to 326,775.40, 489,968.70 and 169,311.40 is: 253,866.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,775.40 : 489,968.70 = 169,311.40 : x
  2. Step 2: Convert to fraction form
    326,775.40/489,968.70 = 169,311.40/x
  3. Step 3: Cross multiply
    326,775.40x = 489,968.70 × 169,311.40
  4. Step 4: Simplify right side
    326,775.40x = 82,957,286,553.18
  5. Step 5: Solve for x
    x = 82,957,286,553.18/326,775.40
  6. Step 6: Final answer
    x = 253,866.38

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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.