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Finding the Fourth Proportional to 485,415.88, 669,862.50 and 281,503.24

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Solution

The fourth proportional to 485,415.88, 669,862.50 and 281,503.24 is: 388,467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,415.88 : 669,862.50 = 281,503.24 : x
  2. Step 2: Convert to fraction form
    485,415.88/669,862.50 = 281,503.24/x
  3. Step 3: Cross multiply
    485,415.88x = 669,862.50 × 281,503.24
  4. Step 4: Simplify right side
    485,415.88x = 188,568,464,104.50
  5. Step 5: Solve for x
    x = 188,568,464,104.50/485,415.88
  6. Step 6: Final answer
    x = 388,467.85

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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.