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Finding the Fourth Proportional to 1,267.76, 1,901.65 and 445.85

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Solution

The fourth proportional to 1,267.76, 1,901.65 and 445.85 is: 668.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.76 : 1,901.65 = 445.85 : x
  2. Step 2: Convert to fraction form
    1,267.76/1,901.65 = 445.85/x
  3. Step 3: Cross multiply
    1,267.76x = 1,901.65 × 445.85
  4. Step 4: Simplify right side
    1,267.76x = 847,842.02
  5. Step 5: Solve for x
    x = 847,842.02/1,267.76
  6. Step 6: Final answer
    x = 668.77

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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.