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Finding the Fourth Proportional to 421,131, 631,516.68 and 243,760.44

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Solution

The fourth proportional to 421,131, 631,516.68 and 243,760.44 is: 365,536.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,131 : 631,516.68 = 243,760.44 : x
  2. Step 2: Convert to fraction form
    421,131/631,516.68 = 243,760.44/x
  3. Step 3: Cross multiply
    421,131x = 631,516.68 × 243,760.44
  4. Step 4: Simplify right side
    421,131x = 153,938,783,784.14
  5. Step 5: Solve for x
    x = 153,938,783,784.14/421,131
  6. Step 6: Final answer
    x = 365,536.58

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1.5x scale

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.