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Finding the Fourth Proportional to 438,752.69, 658,045.77 and 213,886.97

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Solution

The fourth proportional to 438,752.69, 658,045.77 and 213,886.97 is: 320,789.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,752.69 : 658,045.77 = 213,886.97 : x
  2. Step 2: Convert to fraction form
    438,752.69/658,045.77 = 213,886.97/x
  3. Step 3: Cross multiply
    438,752.69x = 658,045.77 × 213,886.97
  4. Step 4: Simplify right side
    438,752.69x = 140,747,415,866.62
  5. Step 5: Solve for x
    x = 140,747,415,866.62/438,752.69
  6. Step 6: Final answer
    x = 320,789.86

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1.5x scale

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.