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Finding the Fourth Proportional to 1,460.64, 2,191.20 and 486.60

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Solution

The fourth proportional to 1,460.64, 2,191.20 and 486.60 is: 729.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,460.64 : 2,191.20 = 486.60 : x
  2. Step 2: Convert to fraction form
    1,460.64/2,191.20 = 486.60/x
  3. Step 3: Cross multiply
    1,460.64x = 2,191.20 × 486.60
  4. Step 4: Simplify right side
    1,460.64x = 1,066,237.92
  5. Step 5: Solve for x
    x = 1,066,237.92/1,460.64
  6. Step 6: Final answer
    x = 729.98

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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.