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Finding the Fourth Proportional to 1,460.63, 2,190.85 and 486.61

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Solution

The fourth proportional to 1,460.63, 2,190.85 and 486.61 is: 729.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,460.63 : 2,190.85 = 486.61 : x
  2. Step 2: Convert to fraction form
    1,460.63/2,190.85 = 486.61/x
  3. Step 3: Cross multiply
    1,460.63x = 2,190.85 × 486.61
  4. Step 4: Simplify right side
    1,460.63x = 1,066,082.82
  5. Step 5: Solve for x
    x = 1,066,082.82/1,460.63
  6. Step 6: Final answer
    x = 729.88

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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.