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Finding the Fourth Proportional to 405,263.20, 607,894.80 and 326,531.20

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Solution

The fourth proportional to 405,263.20, 607,894.80 and 326,531.20 is: 489,796.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,263.20 : 607,894.80 = 326,531.20 : x
  2. Step 2: Convert to fraction form
    405,263.20/607,894.80 = 326,531.20/x
  3. Step 3: Cross multiply
    405,263.20x = 607,894.80 × 326,531.20
  4. Step 4: Simplify right side
    405,263.20x = 198,496,618,517.76
  5. Step 5: Solve for x
    x = 198,496,618,517.76/405,263.20
  6. Step 6: Final answer
    x = 489,796.80

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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.