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Finding the Fourth Proportional to 803.53, 1,108.36 and 554.42

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Solution

The fourth proportional to 803.53, 1,108.36 and 554.42 is: 764.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.53 : 1,108.36 = 554.42 : x
  2. Step 2: Convert to fraction form
    803.53/1,108.36 = 554.42/x
  3. Step 3: Cross multiply
    803.53x = 1,108.36 × 554.42
  4. Step 4: Simplify right side
    803.53x = 614,496.95
  5. Step 5: Solve for x
    x = 614,496.95/803.53
  6. Step 6: Final answer
    x = 764.75

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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.