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Finding the Fourth Proportional to 326,549.70, 489,176.55 and 287,583.30

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Solution

The fourth proportional to 326,549.70, 489,176.55 and 287,583.30 is: 430,804.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,549.70 : 489,176.55 = 287,583.30 : x
  2. Step 2: Convert to fraction form
    326,549.70/489,176.55 = 287,583.30/x
  3. Step 3: Cross multiply
    326,549.70x = 489,176.55 × 287,583.30
  4. Step 4: Simplify right side
    326,549.70x = 140,679,006,531.62
  5. Step 5: Solve for x
    x = 140,679,006,531.62/326,549.70
  6. Step 6: Final answer
    x = 430,804.27

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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.