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Finding the Fourth Proportional to 326,692.89, 489,950.91 and 89,979.30

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Solution

The fourth proportional to 326,692.89, 489,950.91 and 89,979.30 is: 134,944.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,692.89 : 489,950.91 = 89,979.30 : x
  2. Step 2: Convert to fraction form
    326,692.89/489,950.91 = 89,979.30/x
  3. Step 3: Cross multiply
    326,692.89x = 489,950.91 × 89,979.30
  4. Step 4: Simplify right side
    326,692.89x = 44,085,439,916.16
  5. Step 5: Solve for x
    x = 44,085,439,916.16/326,692.89
  6. Step 6: Final answer
    x = 134,944.60

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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.