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Finding the Fourth Proportional to 1,460.01, 2,189.31 and 485.99

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Solution

The fourth proportional to 1,460.01, 2,189.31 and 485.99 is: 728.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,460.01 : 2,189.31 = 485.99 : x
  2. Step 2: Convert to fraction form
    1,460.01/2,189.31 = 485.99/x
  3. Step 3: Cross multiply
    1,460.01x = 2,189.31 × 485.99
  4. Step 4: Simplify right side
    1,460.01x = 1,063,982.77
  5. Step 5: Solve for x
    x = 1,063,982.77/1,460.01
  6. Step 6: Final answer
    x = 728.75

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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.