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Finding the Fourth Proportional to 395,208.66, 592,874.96 and 128,907.69

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Solution

The fourth proportional to 395,208.66, 592,874.96 and 128,907.69 is: 193,381.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,208.66 : 592,874.96 = 128,907.69 : x
  2. Step 2: Convert to fraction form
    395,208.66/592,874.96 = 128,907.69/x
  3. Step 3: Cross multiply
    395,208.66x = 592,874.96 × 128,907.69
  4. Step 4: Simplify right side
    395,208.66x = 76,426,141,552.44
  5. Step 5: Solve for x
    x = 76,426,141,552.44/395,208.66
  6. Step 6: Final answer
    x = 193,381.75

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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.