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Finding the Fourth Proportional to 393,995.52, 590,674.56 and 123,985.92

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Solution

The fourth proportional to 393,995.52, 590,674.56 and 123,985.92 is: 185,878.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,995.52 : 590,674.56 = 123,985.92 : x
  2. Step 2: Convert to fraction form
    393,995.52/590,674.56 = 123,985.92/x
  3. Step 3: Cross multiply
    393,995.52x = 590,674.56 × 123,985.92
  4. Step 4: Simplify right side
    393,995.52x = 73,235,328,742.20
  5. Step 5: Solve for x
    x = 73,235,328,742.20/393,995.52
  6. Step 6: Final answer
    x = 185,878.58

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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.