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Finding the Fourth Proportional to 1,027.02, 1,415.59 and 727.89

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Solution

The fourth proportional to 1,027.02, 1,415.59 and 727.89 is: 1,003.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.02 : 1,415.59 = 727.89 : x
  2. Step 2: Convert to fraction form
    1,027.02/1,415.59 = 727.89/x
  3. Step 3: Cross multiply
    1,027.02x = 1,415.59 × 727.89
  4. Step 4: Simplify right side
    1,027.02x = 1,030,393.81
  5. Step 5: Solve for x
    x = 1,030,393.81/1,027.02
  6. Step 6: Final answer
    x = 1,003.29

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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.