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Finding the Fourth Proportional to 394,991.52, 592,548.71 and 128,689.98

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Solution

The fourth proportional to 394,991.52, 592,548.71 and 128,689.98 is: 193,054.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,991.52 : 592,548.71 = 128,689.98 : x
  2. Step 2: Convert to fraction form
    394,991.52/592,548.71 = 128,689.98/x
  3. Step 3: Cross multiply
    394,991.52x = 592,548.71 × 128,689.98
  4. Step 4: Simplify right side
    394,991.52x = 76,255,080,995.48
  5. Step 5: Solve for x
    x = 76,255,080,995.48/394,991.52
  6. Step 6: Final answer
    x = 193,054.98

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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.