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Finding the Fourth Proportional to 1,295.35, 1,940.87 and 909.91

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Solution

The fourth proportional to 1,295.35, 1,940.87 and 909.91 is: 1,363.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.35 : 1,940.87 = 909.91 : x
  2. Step 2: Convert to fraction form
    1,295.35/1,940.87 = 909.91/x
  3. Step 3: Cross multiply
    1,295.35x = 1,940.87 × 909.91
  4. Step 4: Simplify right side
    1,295.35x = 1,766,012.47
  5. Step 5: Solve for x
    x = 1,766,012.47/1,295.35
  6. Step 6: Final answer
    x = 1,363.35

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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.