Home / 208,212.38-312,443-191,272.70

Finding the Fourth Proportional to 208,212.38, 312,443 and 191,272.70

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Solution

The fourth proportional to 208,212.38, 312,443 and 191,272.70 is: 287,023.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,212.38 : 312,443 = 191,272.70 : x
  2. Step 2: Convert to fraction form
    208,212.38/312,443 = 191,272.70/x
  3. Step 3: Cross multiply
    208,212.38x = 312,443 × 191,272.70
  4. Step 4: Simplify right side
    208,212.38x = 59,761,816,206.10
  5. Step 5: Solve for x
    x = 59,761,816,206.10/208,212.38
  6. Step 6: Final answer
    x = 287,023.36

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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.