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Finding the Fourth Proportional to 485,530.85, 670,035.44 and 281,703.13

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Solution

The fourth proportional to 485,530.85, 670,035.44 and 281,703.13 is: 388,751.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,530.85 : 670,035.44 = 281,703.13 : x
  2. Step 2: Convert to fraction form
    485,530.85/670,035.44 = 281,703.13/x
  3. Step 3: Cross multiply
    485,530.85x = 670,035.44 × 281,703.13
  4. Step 4: Simplify right side
    485,530.85x = 188,751,077,575.32
  5. Step 5: Solve for x
    x = 188,751,077,575.32/485,530.85
  6. Step 6: Final answer
    x = 388,751.97

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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.