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Finding the Fourth Proportional to 460.08, 690.20 and 459.60

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Solution

The fourth proportional to 460.08, 690.20 and 459.60 is: 689.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.08 : 690.20 = 459.60 : x
  2. Step 2: Convert to fraction form
    460.08/690.20 = 459.60/x
  3. Step 3: Cross multiply
    460.08x = 690.20 × 459.60
  4. Step 4: Simplify right side
    460.08x = 317,215.92
  5. Step 5: Solve for x
    x = 317,215.92/460.08
  6. Step 6: Final answer
    x = 689.48

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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.