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Finding the Fourth Proportional to 551,003.20, 825,484.20 and 313,640.80

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Solution

The fourth proportional to 551,003.20, 825,484.20 and 313,640.80 is: 469,880.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,003.20 : 825,484.20 = 313,640.80 : x
  2. Step 2: Convert to fraction form
    551,003.20/825,484.20 = 313,640.80/x
  3. Step 3: Cross multiply
    551,003.20x = 825,484.20 × 313,640.80
  4. Step 4: Simplify right side
    551,003.20x = 258,905,524,875.36
  5. Step 5: Solve for x
    x = 258,905,524,875.36/551,003.20
  6. Step 6: Final answer
    x = 469,880.26

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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.