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Finding the Fourth Proportional to 1,335.36, 1,840.29 and 961.69

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Solution

The fourth proportional to 1,335.36, 1,840.29 and 961.69 is: 1,325.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.36 : 1,840.29 = 961.69 : x
  2. Step 2: Convert to fraction form
    1,335.36/1,840.29 = 961.69/x
  3. Step 3: Cross multiply
    1,335.36x = 1,840.29 × 961.69
  4. Step 4: Simplify right side
    1,335.36x = 1,769,788.49
  5. Step 5: Solve for x
    x = 1,769,788.49/1,335.36
  6. Step 6: Final answer
    x = 1,325.33

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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.