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Finding the Fourth Proportional to 804.03, 1,108.08 and 638.18

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Solution

The fourth proportional to 804.03, 1,108.08 and 638.18 is: 879.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.03 : 1,108.08 = 638.18 : x
  2. Step 2: Convert to fraction form
    804.03/1,108.08 = 638.18/x
  3. Step 3: Cross multiply
    804.03x = 1,108.08 × 638.18
  4. Step 4: Simplify right side
    804.03x = 707,153.11
  5. Step 5: Solve for x
    x = 707,153.11/804.03
  6. Step 6: Final answer
    x = 879.51

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Half scale
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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.