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Finding the Fourth Proportional to 804.10, 1,108.25 and 663.39

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Solution

The fourth proportional to 804.10, 1,108.25 and 663.39 is: 914.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.10 : 1,108.25 = 663.39 : x
  2. Step 2: Convert to fraction form
    804.10/1,108.25 = 663.39/x
  3. Step 3: Cross multiply
    804.10x = 1,108.25 × 663.39
  4. Step 4: Simplify right side
    804.10x = 735,193.11
  5. Step 5: Solve for x
    x = 735,193.11/804.10
  6. Step 6: Final answer
    x = 914.31

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Double scale
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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.