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Finding the Fourth Proportional to 393,529.86, 543,068.70 and 223,764

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Solution

The fourth proportional to 393,529.86, 543,068.70 and 223,764 is: 308,792.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,529.86 : 543,068.70 = 223,764 : x
  2. Step 2: Convert to fraction form
    393,529.86/543,068.70 = 223,764/x
  3. Step 3: Cross multiply
    393,529.86x = 543,068.70 × 223,764
  4. Step 4: Simplify right side
    393,529.86x = 121,519,224,586.80
  5. Step 5: Solve for x
    x = 121,519,224,586.80/393,529.86
  6. Step 6: Final answer
    x = 308,792.89

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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.