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Finding the Fourth Proportional to 619.79, 930.04 and 254.50

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Solution

The fourth proportional to 619.79, 930.04 and 254.50 is: 381.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.79 : 930.04 = 254.50 : x
  2. Step 2: Convert to fraction form
    619.79/930.04 = 254.50/x
  3. Step 3: Cross multiply
    619.79x = 930.04 × 254.50
  4. Step 4: Simplify right side
    619.79x = 236,692.22
  5. Step 5: Solve for x
    x = 236,692.22/619.79
  6. Step 6: Final answer
    x = 381.89

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.