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Finding the Fourth Proportional to 326,083.60, 489,125.40 and 287,592.40

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Solution

The fourth proportional to 326,083.60, 489,125.40 and 287,592.40 is: 431,388.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,083.60 : 489,125.40 = 287,592.40 : x
  2. Step 2: Convert to fraction form
    326,083.60/489,125.40 = 287,592.40/x
  3. Step 3: Cross multiply
    326,083.60x = 489,125.40 × 287,592.40
  4. Step 4: Simplify right side
    326,083.60x = 140,668,747,686.96
  5. Step 5: Solve for x
    x = 140,668,747,686.96/326,083.60
  6. Step 6: Final answer
    x = 431,388.60

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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.