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Finding the Fourth Proportional to 636,820.20, 955,230.30 and 424,243.80

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Solution

The fourth proportional to 636,820.20, 955,230.30 and 424,243.80 is: 636,365.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,820.20 : 955,230.30 = 424,243.80 : x
  2. Step 2: Convert to fraction form
    636,820.20/955,230.30 = 424,243.80/x
  3. Step 3: Cross multiply
    636,820.20x = 955,230.30 × 424,243.80
  4. Step 4: Simplify right side
    636,820.20x = 405,250,532,347.14
  5. Step 5: Solve for x
    x = 405,250,532,347.14/636,820.20
  6. Step 6: Final answer
    x = 636,365.70

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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.