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Finding the Fourth Proportional to 1,460.56, 2,190.36 and 486.40

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Solution

The fourth proportional to 1,460.56, 2,190.36 and 486.40 is: 729.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,460.56 : 2,190.36 = 486.40 : x
  2. Step 2: Convert to fraction form
    1,460.56/2,190.36 = 486.40/x
  3. Step 3: Cross multiply
    1,460.56x = 2,190.36 × 486.40
  4. Step 4: Simplify right side
    1,460.56x = 1,065,391.10
  5. Step 5: Solve for x
    x = 1,065,391.10/1,460.56
  6. Step 6: Final answer
    x = 729.44

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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.