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Finding the Fourth Proportional to 280,565.45, 420,860.67 and 102,975.58

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Solution

The fourth proportional to 280,565.45, 420,860.67 and 102,975.58 is: 154,467.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,565.45 : 420,860.67 = 102,975.58 : x
  2. Step 2: Convert to fraction form
    280,565.45/420,860.67 = 102,975.58/x
  3. Step 3: Cross multiply
    280,565.45x = 420,860.67 × 102,975.58
  4. Step 4: Simplify right side
    280,565.45x = 43,338,371,592.44
  5. Step 5: Solve for x
    x = 43,338,371,592.44/280,565.45
  6. Step 6: Final answer
    x = 154,467.96

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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.