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Finding the Fourth Proportional to 386,293.68, 579,297.92 and 133,509.68

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Solution

The fourth proportional to 386,293.68, 579,297.92 and 133,509.68 is: 200,215.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,293.68 : 579,297.92 = 133,509.68 : x
  2. Step 2: Convert to fraction form
    386,293.68/579,297.92 = 133,509.68/x
  3. Step 3: Cross multiply
    386,293.68x = 579,297.92 × 133,509.68
  4. Step 4: Simplify right side
    386,293.68x = 77,341,879,923.87
  5. Step 5: Solve for x
    x = 77,341,879,923.87/386,293.68
  6. Step 6: Final answer
    x = 200,215.24

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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.