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Finding the Fourth Proportional to 478,615.80, 660,488.36 and 263,755.80

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Solution

The fourth proportional to 478,615.80, 660,488.36 and 263,755.80 is: 363,982.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,615.80 : 660,488.36 = 263,755.80 : x
  2. Step 2: Convert to fraction form
    478,615.80/660,488.36 = 263,755.80/x
  3. Step 3: Cross multiply
    478,615.80x = 660,488.36 × 263,755.80
  4. Step 4: Simplify right side
    478,615.80x = 174,207,635,782.49
  5. Step 5: Solve for x
    x = 174,207,635,782.49/478,615.80
  6. Step 6: Final answer
    x = 363,982.21

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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.