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Finding the Fourth Proportional to 387,852, 581,634 and 135,067.60

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Solution

The fourth proportional to 387,852, 581,634 and 135,067.60 is: 202,551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,852 : 581,634 = 135,067.60 : x
  2. Step 2: Convert to fraction form
    387,852/581,634 = 135,067.60/x
  3. Step 3: Cross multiply
    387,852x = 581,634 × 135,067.60
  4. Step 4: Simplify right side
    387,852x = 78,559,908,458.40
  5. Step 5: Solve for x
    x = 78,559,908,458.40/387,852
  6. Step 6: Final answer
    x = 202,551.25

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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.