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Finding the Fourth Proportional to 805.33, 1,111.08 and 490.51

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Solution

The fourth proportional to 805.33, 1,111.08 and 490.51 is: 676.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.33 : 1,111.08 = 490.51 : x
  2. Step 2: Convert to fraction form
    805.33/1,111.08 = 490.51/x
  3. Step 3: Cross multiply
    805.33x = 1,111.08 × 490.51
  4. Step 4: Simplify right side
    805.33x = 544,995.85
  5. Step 5: Solve for x
    x = 544,995.85/805.33
  6. Step 6: Final answer
    x = 676.74

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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.