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Finding the Fourth Proportional to 316,190.50, 436,485.18 and 201,622.72

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Solution

The fourth proportional to 316,190.50, 436,485.18 and 201,622.72 is: 278,330.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,190.50 : 436,485.18 = 201,622.72 : x
  2. Step 2: Convert to fraction form
    316,190.50/436,485.18 = 201,622.72/x
  3. Step 3: Cross multiply
    316,190.50x = 436,485.18 × 201,622.72
  4. Step 4: Simplify right side
    316,190.50x = 88,005,329,231.29
  5. Step 5: Solve for x
    x = 88,005,329,231.29/316,190.50
  6. Step 6: Final answer
    x = 278,330.09

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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.