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Finding the Fourth Proportional to 804.18, 1,109.78 and 450.13

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Solution

The fourth proportional to 804.18, 1,109.78 and 450.13 is: 621.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.18 : 1,109.78 = 450.13 : x
  2. Step 2: Convert to fraction form
    804.18/1,109.78 = 450.13/x
  3. Step 3: Cross multiply
    804.18x = 1,109.78 × 450.13
  4. Step 4: Simplify right side
    804.18x = 499,541.70
  5. Step 5: Solve for x
    x = 499,541.70/804.18
  6. Step 6: Final answer
    x = 621.18

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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.