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Finding the Fourth Proportional to 1,335.42, 1,842.48 and 811.08

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Solution

The fourth proportional to 1,335.42, 1,842.48 and 811.08 is: 1,119.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.42 : 1,842.48 = 811.08 : x
  2. Step 2: Convert to fraction form
    1,335.42/1,842.48 = 811.08/x
  3. Step 3: Cross multiply
    1,335.42x = 1,842.48 × 811.08
  4. Step 4: Simplify right side
    1,335.42x = 1,494,398.68
  5. Step 5: Solve for x
    x = 1,494,398.68/1,335.42
  6. Step 6: Final answer
    x = 1,119.05

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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.