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Finding the Fourth Proportional to 881.51, 1,216.40 and 527.36

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Solution

The fourth proportional to 881.51, 1,216.40 and 527.36 is: 727.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.51 : 1,216.40 = 527.36 : x
  2. Step 2: Convert to fraction form
    881.51/1,216.40 = 527.36/x
  3. Step 3: Cross multiply
    881.51x = 1,216.40 × 527.36
  4. Step 4: Simplify right side
    881.51x = 641,485.06
  5. Step 5: Solve for x
    x = 641,485.06/881.51
  6. Step 6: Final answer
    x = 727.71

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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.