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Finding the Fourth Proportional to 391.37, 583.00 and 378.27

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Solution

The fourth proportional to 391.37, 583.00 and 378.27 is: 563.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.37 : 583.00 = 378.27 : x
  2. Step 2: Convert to fraction form
    391.37/583.00 = 378.27/x
  3. Step 3: Cross multiply
    391.37x = 583.00 × 378.27
  4. Step 4: Simplify right side
    391.37x = 220,530.46
  5. Step 5: Solve for x
    x = 220,530.46/391.37
  6. Step 6: Final answer
    x = 563.49

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.