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Finding the Fourth Proportional to 449,020.67, 672,995.39 and 208,810.31

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Solution

The fourth proportional to 449,020.67, 672,995.39 and 208,810.31 is: 312,966.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,020.67 : 672,995.39 = 208,810.31 : x
  2. Step 2: Convert to fraction form
    449,020.67/672,995.39 = 208,810.31/x
  3. Step 3: Cross multiply
    449,020.67x = 672,995.39 × 208,810.31
  4. Step 4: Simplify right side
    449,020.67x = 140,528,371,605.44
  5. Step 5: Solve for x
    x = 140,528,371,605.44/449,020.67
  6. Step 6: Final answer
    x = 312,966.38

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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.