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Finding the Fourth Proportional to 675,109.76, 931,649.92 and 388,525.44

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Solution

The fourth proportional to 675,109.76, 931,649.92 and 388,525.44 is: 536,164.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,109.76 : 931,649.92 = 388,525.44 : x
  2. Step 2: Convert to fraction form
    675,109.76/931,649.92 = 388,525.44/x
  3. Step 3: Cross multiply
    675,109.76x = 931,649.92 × 388,525.44
  4. Step 4: Simplify right side
    675,109.76x = 361,969,695,093.97
  5. Step 5: Solve for x
    x = 361,969,695,093.97/675,109.76
  6. Step 6: Final answer
    x = 536,164.22

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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.