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Finding the Fourth Proportional to 489,969,124.80, 734,953,687.20 and 217,339,891.80

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Solution

The fourth proportional to 489,969,124.80, 734,953,687.20 and 217,339,891.80 is: 326,009,837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,969,124.80 : 734,953,687.20 = 217,339,891.80 : x
  2. Step 2: Convert to fraction form
    489,969,124.80/734,953,687.20 = 217,339,891.80/x
  3. Step 3: Cross multiply
    489,969,124.80x = 734,953,687.20 × 217,339,891.80
  4. Step 4: Simplify right side
    489,969,124.80x = 159,734,754,854,059,072
  5. Step 5: Solve for x
    x = 159,734,754,854,059,072/489,969,124.80
  6. Step 6: Final answer
    x = 326,009,837.70

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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.