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Finding the Fourth Proportional to 460.10, 690.10 and 186.20

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Solution

The fourth proportional to 460.10, 690.10 and 186.20 is: 279.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.10 : 690.10 = 186.20 : x
  2. Step 2: Convert to fraction form
    460.10/690.10 = 186.20/x
  3. Step 3: Cross multiply
    460.10x = 690.10 × 186.20
  4. Step 4: Simplify right side
    460.10x = 128,496.62
  5. Step 5: Solve for x
    x = 128,496.62/460.10
  6. Step 6: Final answer
    x = 279.28

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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.