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Finding the Fourth Proportional to 395,098.65, 592,587.81 and 128,858.73

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Solution

The fourth proportional to 395,098.65, 592,587.81 and 128,858.73 is: 193,268.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,098.65 : 592,587.81 = 128,858.73 : x
  2. Step 2: Convert to fraction form
    395,098.65/592,587.81 = 128,858.73/x
  3. Step 3: Cross multiply
    395,098.65x = 592,587.81 × 128,858.73
  4. Step 4: Simplify right side
    395,098.65x = 76,360,112,610.08
  5. Step 5: Solve for x
    x = 76,360,112,610.08/395,098.65
  6. Step 6: Final answer
    x = 193,268.47

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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.