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Finding the Fourth Proportional to 857.79, 1,286.58 and 241.51

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Solution

The fourth proportional to 857.79, 1,286.58 and 241.51 is: 362.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.79 : 1,286.58 = 241.51 : x
  2. Step 2: Convert to fraction form
    857.79/1,286.58 = 241.51/x
  3. Step 3: Cross multiply
    857.79x = 1,286.58 × 241.51
  4. Step 4: Simplify right side
    857.79x = 310,721.94
  5. Step 5: Solve for x
    x = 310,721.94/857.79
  6. Step 6: Final answer
    x = 362.24

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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.