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Finding the Fourth Proportional to 326,605.40, 489,965.46 and 149,130.38

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Solution

The fourth proportional to 326,605.40, 489,965.46 and 149,130.38 is: 223,721.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,605.40 : 489,965.46 = 149,130.38 : x
  2. Step 2: Convert to fraction form
    326,605.40/489,965.46 = 149,130.38/x
  3. Step 3: Cross multiply
    326,605.40x = 489,965.46 × 149,130.38
  4. Step 4: Simplify right side
    326,605.40x = 73,068,735,236.67
  5. Step 5: Solve for x
    x = 73,068,735,236.67/326,605.40
  6. Step 6: Final answer
    x = 223,721.76

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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.