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Finding the Fourth Proportional to 257,243.04, 385,955.28 and 79,794.72

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Solution

The fourth proportional to 257,243.04, 385,955.28 and 79,794.72 is: 119,720.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,243.04 : 385,955.28 = 79,794.72 : x
  2. Step 2: Convert to fraction form
    257,243.04/385,955.28 = 79,794.72/x
  3. Step 3: Cross multiply
    257,243.04x = 385,955.28 × 79,794.72
  4. Step 4: Simplify right side
    257,243.04x = 30,797,193,500.12
  5. Step 5: Solve for x
    x = 30,797,193,500.12/257,243.04
  6. Step 6: Final answer
    x = 119,720.22

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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.