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Finding the Fourth Proportional to 489,488.76, 734,769.51 and 388,933.20

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Solution

The fourth proportional to 489,488.76, 734,769.51 and 388,933.20 is: 583,825.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,488.76 : 734,769.51 = 388,933.20 : x
  2. Step 2: Convert to fraction form
    489,488.76/734,769.51 = 388,933.20/x
  3. Step 3: Cross multiply
    489,488.76x = 734,769.51 × 388,933.20
  4. Step 4: Simplify right side
    489,488.76x = 285,776,256,786.73
  5. Step 5: Solve for x
    x = 285,776,256,786.73/489,488.76
  6. Step 6: Final answer
    x = 583,825.98

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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.