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Finding the Fourth Proportional to 612.88, 919.22 and 459.04

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Solution

The fourth proportional to 612.88, 919.22 and 459.04 is: 688.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.88 : 919.22 = 459.04 : x
  2. Step 2: Convert to fraction form
    612.88/919.22 = 459.04/x
  3. Step 3: Cross multiply
    612.88x = 919.22 × 459.04
  4. Step 4: Simplify right side
    612.88x = 421,958.75
  5. Step 5: Solve for x
    x = 421,958.75/612.88
  6. Step 6: Final answer
    x = 688.49

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.