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Finding the Fourth Proportional to 1,459.32, 2,189.34 and 485.42

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Solution

The fourth proportional to 1,459.32, 2,189.34 and 485.42 is: 728.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.32 : 2,189.34 = 485.42 : x
  2. Step 2: Convert to fraction form
    1,459.32/2,189.34 = 485.42/x
  3. Step 3: Cross multiply
    1,459.32x = 2,189.34 × 485.42
  4. Step 4: Simplify right side
    1,459.32x = 1,062,749.42
  5. Step 5: Solve for x
    x = 1,062,749.42/1,459.32
  6. Step 6: Final answer
    x = 728.25

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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.