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Finding the Fourth Proportional to 489,065.67, 733,514.40 and 129,240.45

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Solution

The fourth proportional to 489,065.67, 733,514.40 and 129,240.45 is: 193,838.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,065.67 : 733,514.40 = 129,240.45 : x
  2. Step 2: Convert to fraction form
    489,065.67/733,514.40 = 129,240.45/x
  3. Step 3: Cross multiply
    489,065.67x = 733,514.40 × 129,240.45
  4. Step 4: Simplify right side
    489,065.67x = 94,799,731,137.48
  5. Step 5: Solve for x
    x = 94,799,731,137.48/489,065.67
  6. Step 6: Final answer
    x = 193,838.45

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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.