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Finding the Fourth Proportional to 613.31, 919.96 and 304.90

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Solution

The fourth proportional to 613.31, 919.96 and 304.90 is: 457.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.31 : 919.96 = 304.90 : x
  2. Step 2: Convert to fraction form
    613.31/919.96 = 304.90/x
  3. Step 3: Cross multiply
    613.31x = 919.96 × 304.90
  4. Step 4: Simplify right side
    613.31x = 280,492.74
  5. Step 5: Solve for x
    x = 280,492.74/613.31
  6. Step 6: Final answer
    x = 457.35

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.