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Finding the Fourth Proportional to 489,128.40, 733,697.34 and 185,440.89

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Solution

The fourth proportional to 489,128.40, 733,697.34 and 185,440.89 is: 278,163.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,128.40 : 733,697.34 = 185,440.89 : x
  2. Step 2: Convert to fraction form
    489,128.40/733,697.34 = 185,440.89/x
  3. Step 3: Cross multiply
    489,128.40x = 733,697.34 × 185,440.89
  4. Step 4: Simplify right side
    489,128.40x = 136,057,489,645.81
  5. Step 5: Solve for x
    x = 136,057,489,645.81/489,128.40
  6. Step 6: Final answer
    x = 278,163.13

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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.