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Finding the Fourth Proportional to 485,243.72, 669,627.31 and 270,379.21

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Solution

The fourth proportional to 485,243.72, 669,627.31 and 270,379.21 is: 373,118.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,243.72 : 669,627.31 = 270,379.21 : x
  2. Step 2: Convert to fraction form
    485,243.72/669,627.31 = 270,379.21/x
  3. Step 3: Cross multiply
    485,243.72x = 669,627.31 × 270,379.21
  4. Step 4: Simplify right side
    485,243.72x = 181,053,303,072.23
  5. Step 5: Solve for x
    x = 181,053,303,072.23/485,243.72
  6. Step 6: Final answer
    x = 373,118.28

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1.5x scale

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.