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Finding the Fourth Proportional to 489,019.40, 733,961.10 and 289,089.80

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Solution

The fourth proportional to 489,019.40, 733,961.10 and 289,089.80 is: 433,890.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,019.40 : 733,961.10 = 289,089.80 : x
  2. Step 2: Convert to fraction form
    489,019.40/733,961.10 = 289,089.80/x
  3. Step 3: Cross multiply
    489,019.40x = 733,961.10 × 289,089.80
  4. Step 4: Simplify right side
    489,019.40x = 212,180,667,606.78
  5. Step 5: Solve for x
    x = 212,180,667,606.78/489,019.40
  6. Step 6: Final answer
    x = 433,890.08

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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.