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Finding the Fourth Proportional to 395,386.12, 545,671.98 and 225,645.76

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Solution

The fourth proportional to 395,386.12, 545,671.98 and 225,645.76 is: 311,413.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,386.12 : 545,671.98 = 225,645.76 : x
  2. Step 2: Convert to fraction form
    395,386.12/545,671.98 = 225,645.76/x
  3. Step 3: Cross multiply
    395,386.12x = 545,671.98 × 225,645.76
  4. Step 4: Simplify right side
    395,386.12x = 123,128,568,637.81
  5. Step 5: Solve for x
    x = 123,128,568,637.81/395,386.12
  6. Step 6: Final answer
    x = 311,413.48

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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.