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Finding the Fourth Proportional to 391,121.48, 539,702.98 and 219,015.52

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Solution

The fourth proportional to 391,121.48, 539,702.98 and 219,015.52 is: 302,216.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,121.48 : 539,702.98 = 219,015.52 : x
  2. Step 2: Convert to fraction form
    391,121.48/539,702.98 = 219,015.52/x
  3. Step 3: Cross multiply
    391,121.48x = 539,702.98 × 219,015.52
  4. Step 4: Simplify right side
    391,121.48x = 118,203,328,810.25
  5. Step 5: Solve for x
    x = 118,203,328,810.25/391,121.48
  6. Step 6: Final answer
    x = 302,216.41

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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.