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Finding the Fourth Proportional to 619.06, 928.28 and 253.75

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Solution

The fourth proportional to 619.06, 928.28 and 253.75 is: 380.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.06 : 928.28 = 253.75 : x
  2. Step 2: Convert to fraction form
    619.06/928.28 = 253.75/x
  3. Step 3: Cross multiply
    619.06x = 928.28 × 253.75
  4. Step 4: Simplify right side
    619.06x = 235,551.05
  5. Step 5: Solve for x
    x = 235,551.05/619.06
  6. Step 6: Final answer
    x = 380.50

Related Problems

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.