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Finding the Fourth Proportional to 655,020.80, 982,531.20 and 489,132.80

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Solution

The fourth proportional to 655,020.80, 982,531.20 and 489,132.80 is: 733,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,020.80 : 982,531.20 = 489,132.80 : x
  2. Step 2: Convert to fraction form
    655,020.80/982,531.20 = 489,132.80/x
  3. Step 3: Cross multiply
    655,020.80x = 982,531.20 × 489,132.80
  4. Step 4: Simplify right side
    655,020.80x = 480,588,236,943.36
  5. Step 5: Solve for x
    x = 480,588,236,943.36/655,020.80
  6. Step 6: Final answer
    x = 733,699.20

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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.