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Finding the Fourth Proportional to 545,791.20, 818,686.80 and 521,296.80

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Solution

The fourth proportional to 545,791.20, 818,686.80 and 521,296.80 is: 781,945.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,791.20 : 818,686.80 = 521,296.80 : x
  2. Step 2: Convert to fraction form
    545,791.20/818,686.80 = 521,296.80/x
  3. Step 3: Cross multiply
    545,791.20x = 818,686.80 × 521,296.80
  4. Step 4: Simplify right side
    545,791.20x = 426,778,809,042.24
  5. Step 5: Solve for x
    x = 426,778,809,042.24/545,791.20
  6. Step 6: Final answer
    x = 781,945.20

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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.