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Finding the Fourth Proportional to 619.24, 928.98 and 208.30

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Solution

The fourth proportional to 619.24, 928.98 and 208.30 is: 312.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.24 : 928.98 = 208.30 : x
  2. Step 2: Convert to fraction form
    619.24/928.98 = 208.30/x
  3. Step 3: Cross multiply
    619.24x = 928.98 × 208.30
  4. Step 4: Simplify right side
    619.24x = 193,506.53
  5. Step 5: Solve for x
    x = 193,506.53/619.24
  6. Step 6: Final answer
    x = 312.49

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.