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Finding the Fourth Proportional to 1,459.41, 2,189.31 and 485.38

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Solution

The fourth proportional to 1,459.41, 2,189.31 and 485.38 is: 728.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.41 : 2,189.31 = 485.38 : x
  2. Step 2: Convert to fraction form
    1,459.41/2,189.31 = 485.38/x
  3. Step 3: Cross multiply
    1,459.41x = 2,189.31 × 485.38
  4. Step 4: Simplify right side
    1,459.41x = 1,062,647.29
  5. Step 5: Solve for x
    x = 1,062,647.29/1,459.41
  6. Step 6: Final answer
    x = 728.13

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1.5x scale

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.