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Finding the Fourth Proportional to 316,940, 437,377.20 and 189,620.96

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Solution

The fourth proportional to 316,940, 437,377.20 and 189,620.96 is: 261,676.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,940 : 437,377.20 = 189,620.96 : x
  2. Step 2: Convert to fraction form
    316,940/437,377.20 = 189,620.96/x
  3. Step 3: Cross multiply
    316,940x = 437,377.20 × 189,620.96
  4. Step 4: Simplify right side
    316,940x = 82,935,884,546.11
  5. Step 5: Solve for x
    x = 82,935,884,546.11/316,940
  6. Step 6: Final answer
    x = 261,676.92

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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.