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Finding the Fourth Proportional to 515,820.20, 773,730.30 and 403,845.80

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Solution

The fourth proportional to 515,820.20, 773,730.30 and 403,845.80 is: 605,768.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,820.20 : 773,730.30 = 403,845.80 : x
  2. Step 2: Convert to fraction form
    515,820.20/773,730.30 = 403,845.80/x
  3. Step 3: Cross multiply
    515,820.20x = 773,730.30 × 403,845.80
  4. Step 4: Simplify right side
    515,820.20x = 312,467,731,987.74
  5. Step 5: Solve for x
    x = 312,467,731,987.74/515,820.20
  6. Step 6: Final answer
    x = 605,768.70

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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.