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Finding the Fourth Proportional to 609.51, 914.26 and 487.20

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Solution

The fourth proportional to 609.51, 914.26 and 487.20 is: 730.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.51 : 914.26 = 487.20 : x
  2. Step 2: Convert to fraction form
    609.51/914.26 = 487.20/x
  3. Step 3: Cross multiply
    609.51x = 914.26 × 487.20
  4. Step 4: Simplify right side
    609.51x = 445,422.90
  5. Step 5: Solve for x
    x = 445,422.90/609.51
  6. Step 6: Final answer
    x = 730.79

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