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Finding the Fourth Proportional to 803.40, 1,108.32 and 554.33

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Solution

The fourth proportional to 803.40, 1,108.32 and 554.33 is: 764.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.40 : 1,108.32 = 554.33 : x
  2. Step 2: Convert to fraction form
    803.40/1,108.32 = 554.33/x
  3. Step 3: Cross multiply
    803.40x = 1,108.32 × 554.33
  4. Step 4: Simplify right side
    803.40x = 614,369.48
  5. Step 5: Solve for x
    x = 614,369.48/803.40
  6. Step 6: Final answer
    x = 764.71

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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.