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Finding the Fourth Proportional to 393,415.66, 589,126.96 and 243,947.88

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Solution

The fourth proportional to 393,415.66, 589,126.96 and 243,947.88 is: 365,303.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,415.66 : 589,126.96 = 243,947.88 : x
  2. Step 2: Convert to fraction form
    393,415.66/589,126.96 = 243,947.88/x
  3. Step 3: Cross multiply
    393,415.66x = 589,126.96 × 243,947.88
  4. Step 4: Simplify right side
    393,415.66x = 143,716,272,942.85
  5. Step 5: Solve for x
    x = 143,716,272,942.85/393,415.66
  6. Step 6: Final answer
    x = 365,303.89

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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.