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Finding the Fourth Proportional to 287,287.74, 396,396.72 and 166,421.79

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Solution

The fourth proportional to 287,287.74, 396,396.72 and 166,421.79 is: 229,627.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,287.74 : 396,396.72 = 166,421.79 : x
  2. Step 2: Convert to fraction form
    287,287.74/396,396.72 = 166,421.79/x
  3. Step 3: Cross multiply
    287,287.74x = 396,396.72 × 166,421.79
  4. Step 4: Simplify right side
    287,287.74x = 65,969,051,692.53
  5. Step 5: Solve for x
    x = 65,969,051,692.53/287,287.74
  6. Step 6: Final answer
    x = 229,627.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.