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Finding the Fourth Proportional to 1,459.44, 2,012.88 and 961.28

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Solution

The fourth proportional to 1,459.44, 2,012.88 and 961.28 is: 1,325.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.44 : 2,012.88 = 961.28 : x
  2. Step 2: Convert to fraction form
    1,459.44/2,012.88 = 961.28/x
  3. Step 3: Cross multiply
    1,459.44x = 2,012.88 × 961.28
  4. Step 4: Simplify right side
    1,459.44x = 1,934,941.29
  5. Step 5: Solve for x
    x = 1,934,941.29/1,459.44
  6. Step 6: Final answer
    x = 1,325.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.