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Finding the Fourth Proportional to 421,244.20, 631,866.30 and 234,255.70

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Solution

The fourth proportional to 421,244.20, 631,866.30 and 234,255.70 is: 351,383.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,244.20 : 631,866.30 = 234,255.70 : x
  2. Step 2: Convert to fraction form
    421,244.20/631,866.30 = 234,255.70/x
  3. Step 3: Cross multiply
    421,244.20x = 631,866.30 × 234,255.70
  4. Step 4: Simplify right side
    421,244.20x = 148,018,282,412.91
  5. Step 5: Solve for x
    x = 148,018,282,412.91/421,244.20
  6. Step 6: Final answer
    x = 351,383.55

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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.