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Finding the Fourth Proportional to 391,085.80, 539,697.78 and 212,237.80

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Solution

The fourth proportional to 391,085.80, 539,697.78 and 212,237.80 is: 292,887.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,085.80 : 539,697.78 = 212,237.80 : x
  2. Step 2: Convert to fraction form
    391,085.80/539,697.78 = 212,237.80/x
  3. Step 3: Cross multiply
    391,085.80x = 539,697.78 × 212,237.80
  4. Step 4: Simplify right side
    391,085.80x = 114,544,269,492.08
  5. Step 5: Solve for x
    x = 114,544,269,492.08/391,085.80
  6. Step 6: Final answer
    x = 292,887.83

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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.