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Finding the Fourth Proportional to 489,169.44, 675,061.20 and 285,214.80

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Solution

The fourth proportional to 489,169.44, 675,061.20 and 285,214.80 is: 393,600.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,169.44 : 675,061.20 = 285,214.80 : x
  2. Step 2: Convert to fraction form
    489,169.44/675,061.20 = 285,214.80/x
  3. Step 3: Cross multiply
    489,169.44x = 675,061.20 × 285,214.80
  4. Step 4: Simplify right side
    489,169.44x = 192,537,445,145.76
  5. Step 5: Solve for x
    x = 192,537,445,145.76/489,169.44
  6. Step 6: Final answer
    x = 393,600.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.