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Finding the Fourth Proportional to 291,930.30, 436,923.45 and 211,740.30

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Solution

The fourth proportional to 291,930.30, 436,923.45 and 211,740.30 is: 316,905.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,930.30 : 436,923.45 = 211,740.30 : x
  2. Step 2: Convert to fraction form
    291,930.30/436,923.45 = 211,740.30/x
  3. Step 3: Cross multiply
    291,930.30x = 436,923.45 × 211,740.30
  4. Step 4: Simplify right side
    291,930.30x = 92,514,302,380.04
  5. Step 5: Solve for x
    x = 92,514,302,380.04/291,930.30
  6. Step 6: Final answer
    x = 316,905.45

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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.