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Finding the Fourth Proportional to 395,072.64, 592,703.28 and 128,833.38

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Solution

The fourth proportional to 395,072.64, 592,703.28 and 128,833.38 is: 193,280.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,072.64 : 592,703.28 = 128,833.38 : x
  2. Step 2: Convert to fraction form
    395,072.64/592,703.28 = 128,833.38/x
  3. Step 3: Cross multiply
    395,072.64x = 592,703.28 × 128,833.38
  4. Step 4: Simplify right side
    395,072.64x = 76,359,966,899.49
  5. Step 5: Solve for x
    x = 76,359,966,899.49/395,072.64
  6. Step 6: Final answer
    x = 193,280.83

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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.