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Finding the Fourth Proportional to 800.81, 1,105.14 and 446.76

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Solution

The fourth proportional to 800.81, 1,105.14 and 446.76 is: 616.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.81 : 1,105.14 = 446.76 : x
  2. Step 2: Convert to fraction form
    800.81/1,105.14 = 446.76/x
  3. Step 3: Cross multiply
    800.81x = 1,105.14 × 446.76
  4. Step 4: Simplify right side
    800.81x = 493,732.35
  5. Step 5: Solve for x
    x = 493,732.35/800.81
  6. Step 6: Final answer
    x = 616.54

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Find fourth proportional to 400.41, 552.57 and 223.38
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.