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Finding the Fourth Proportional to 396,279.48, 546,866.73 and 214,991.40

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Solution

The fourth proportional to 396,279.48, 546,866.73 and 214,991.40 is: 296,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,279.48 : 546,866.73 = 214,991.40 : x
  2. Step 2: Convert to fraction form
    396,279.48/546,866.73 = 214,991.40/x
  3. Step 3: Cross multiply
    396,279.48x = 546,866.73 × 214,991.40
  4. Step 4: Simplify right side
    396,279.48x = 117,571,642,821.17
  5. Step 5: Solve for x
    x = 117,571,642,821.17/396,279.48
  6. Step 6: Final answer
    x = 296,688.70

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1.5x scale

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.