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Finding the Fourth Proportional to 421,362.50, 581,490.78 and 255,792.43

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Solution

The fourth proportional to 421,362.50, 581,490.78 and 255,792.43 is: 352,999.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,362.50 : 581,490.78 = 255,792.43 : x
  2. Step 2: Convert to fraction form
    421,362.50/581,490.78 = 255,792.43/x
  3. Step 3: Cross multiply
    421,362.50x = 581,490.78 × 255,792.43
  4. Step 4: Simplify right side
    421,362.50x = 148,740,936,731.34
  5. Step 5: Solve for x
    x = 148,740,936,731.34/421,362.50
  6. Step 6: Final answer
    x = 352,999.94

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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.