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Finding the Fourth Proportional to 326,566.81, 490,036.76 and 126,861.21

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Solution

The fourth proportional to 326,566.81, 490,036.76 and 126,861.21 is: 190,364.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,566.81 : 490,036.76 = 126,861.21 : x
  2. Step 2: Convert to fraction form
    326,566.81/490,036.76 = 126,861.21/x
  3. Step 3: Cross multiply
    326,566.81x = 490,036.76 × 126,861.21
  4. Step 4: Simplify right side
    326,566.81x = 62,166,656,318.08
  5. Step 5: Solve for x
    x = 62,166,656,318.08/326,566.81
  6. Step 6: Final answer
    x = 190,364.28

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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.