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Finding the Fourth Proportional to 421,213.48, 581,274.48 and 239,942.20

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Solution

The fourth proportional to 421,213.48, 581,274.48 and 239,942.20 is: 331,120.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,213.48 : 581,274.48 = 239,942.20 : x
  2. Step 2: Convert to fraction form
    421,213.48/581,274.48 = 239,942.20/x
  3. Step 3: Cross multiply
    421,213.48x = 581,274.48 × 239,942.20
  4. Step 4: Simplify right side
    421,213.48x = 139,472,277,535.06
  5. Step 5: Solve for x
    x = 139,472,277,535.06/421,213.48
  6. Step 6: Final answer
    x = 331,120.17

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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.