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Finding the Fourth Proportional to 818.80, 1,131.38 and 654.37

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Solution

The fourth proportional to 818.80, 1,131.38 and 654.37 is: 904.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.80 : 1,131.38 = 654.37 : x
  2. Step 2: Convert to fraction form
    818.80/1,131.38 = 654.37/x
  3. Step 3: Cross multiply
    818.80x = 1,131.38 × 654.37
  4. Step 4: Simplify right side
    818.80x = 740,342.77
  5. Step 5: Solve for x
    x = 740,342.77/818.80
  6. Step 6: Final answer
    x = 904.18

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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.