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Finding the Fourth Proportional to 395,074.64, 592,706.28 and 128,835.38

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Solution

The fourth proportional to 395,074.64, 592,706.28 and 128,835.38 is: 193,283.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,074.64 : 592,706.28 = 128,835.38 : x
  2. Step 2: Convert to fraction form
    395,074.64/592,706.28 = 128,835.38/x
  3. Step 3: Cross multiply
    395,074.64x = 592,706.28 × 128,835.38
  4. Step 4: Simplify right side
    395,074.64x = 76,361,538,812.19
  5. Step 5: Solve for x
    x = 76,361,538,812.19/395,074.64
  6. Step 6: Final answer
    x = 193,283.83

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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.