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Finding the Fourth Proportional to 504,342.40, 755,515.20 and 326,972.80

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Solution

The fourth proportional to 504,342.40, 755,515.20 and 326,972.80 is: 489,811.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    504,342.40 : 755,515.20 = 326,972.80 : x
  2. Step 2: Convert to fraction form
    504,342.40/755,515.20 = 326,972.80/x
  3. Step 3: Cross multiply
    504,342.40x = 755,515.20 × 326,972.80
  4. Step 4: Simplify right side
    504,342.40x = 247,032,920,386.56
  5. Step 5: Solve for x
    x = 247,032,920,386.56/504,342.40
  6. Step 6: Final answer
    x = 489,811.92

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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.