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Finding the Fourth Proportional to 326,603.40, 489,962.46 and 149,128.38

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Solution

The fourth proportional to 326,603.40, 489,962.46 and 149,128.38 is: 223,718.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,603.40 : 489,962.46 = 149,128.38 : x
  2. Step 2: Convert to fraction form
    326,603.40/489,962.46 = 149,128.38/x
  3. Step 3: Cross multiply
    326,603.40x = 489,962.46 × 149,128.38
  4. Step 4: Simplify right side
    326,603.40x = 73,067,307,920.61
  5. Step 5: Solve for x
    x = 73,067,307,920.61/326,603.40
  6. Step 6: Final answer
    x = 223,718.76

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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.