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Finding the Fourth Proportional to 883.35, 1,217.56 and 620.91

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Solution

The fourth proportional to 883.35, 1,217.56 and 620.91 is: 855.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.35 : 1,217.56 = 620.91 : x
  2. Step 2: Convert to fraction form
    883.35/1,217.56 = 620.91/x
  3. Step 3: Cross multiply
    883.35x = 1,217.56 × 620.91
  4. Step 4: Simplify right side
    883.35x = 755,992.08
  5. Step 5: Solve for x
    x = 755,992.08/883.35
  6. Step 6: Final answer
    x = 855.82

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1.5x scale

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.