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Finding the Fourth Proportional to 545,198.60, 752,606.69 and 388,135.77

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Solution

The fourth proportional to 545,198.60, 752,606.69 and 388,135.77 is: 535,792.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,198.60 : 752,606.69 = 388,135.77 : x
  2. Step 2: Convert to fraction form
    545,198.60/752,606.69 = 388,135.77/x
  3. Step 3: Cross multiply
    545,198.60x = 752,606.69 × 388,135.77
  4. Step 4: Simplify right side
    545,198.60x = 292,113,580,900.73
  5. Step 5: Solve for x
    x = 292,113,580,900.73/545,198.60
  6. Step 6: Final answer
    x = 535,792.98

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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.