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Finding the Fourth Proportional to 319,870.32, 479,059.20 and 252,860.64

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Solution

The fourth proportional to 319,870.32, 479,059.20 and 252,860.64 is: 378,701.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,870.32 : 479,059.20 = 252,860.64 : x
  2. Step 2: Convert to fraction form
    319,870.32/479,059.20 = 252,860.64/x
  3. Step 3: Cross multiply
    319,870.32x = 479,059.20 × 252,860.64
  4. Step 4: Simplify right side
    319,870.32x = 121,135,215,909.89
  5. Step 5: Solve for x
    x = 121,135,215,909.89/319,870.32
  6. Step 6: Final answer
    x = 378,701.02

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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.