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Finding the Fourth Proportional to 395,955.12, 593,807.64 and 129,654.42

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Solution

The fourth proportional to 395,955.12, 593,807.64 and 129,654.42 is: 194,440.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,955.12 : 593,807.64 = 129,654.42 : x
  2. Step 2: Convert to fraction form
    395,955.12/593,807.64 = 129,654.42/x
  3. Step 3: Cross multiply
    395,955.12x = 593,807.64 × 129,654.42
  4. Step 4: Simplify right side
    395,955.12x = 76,989,785,155.77
  5. Step 5: Solve for x
    x = 76,989,785,155.77/395,955.12
  6. Step 6: Final answer
    x = 194,440.69

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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.