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Finding the Fourth Proportional to 515,046.80, 772,570.20 and 438,939.20

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Solution

The fourth proportional to 515,046.80, 772,570.20 and 438,939.20 is: 658,408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,046.80 : 772,570.20 = 438,939.20 : x
  2. Step 2: Convert to fraction form
    515,046.80/772,570.20 = 438,939.20/x
  3. Step 3: Cross multiply
    515,046.80x = 772,570.20 × 438,939.20
  4. Step 4: Simplify right side
    515,046.80x = 339,111,345,531.84
  5. Step 5: Solve for x
    x = 339,111,345,531.84/515,046.80
  6. Step 6: Final answer
    x = 658,408.80

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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.