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Finding the Fourth Proportional to 272,011.80, 407,619.30 and 243,931.80

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Solution

The fourth proportional to 272,011.80, 407,619.30 and 243,931.80 is: 365,540.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,011.80 : 407,619.30 = 243,931.80 : x
  2. Step 2: Convert to fraction form
    272,011.80/407,619.30 = 243,931.80/x
  3. Step 3: Cross multiply
    272,011.80x = 407,619.30 × 243,931.80
  4. Step 4: Simplify right side
    272,011.80x = 99,431,309,563.74
  5. Step 5: Solve for x
    x = 99,431,309,563.74/272,011.80
  6. Step 6: Final answer
    x = 365,540.43

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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.