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Finding the Fourth Proportional to 1,015.01, 1,400.51 and 611.17

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Solution

The fourth proportional to 1,015.01, 1,400.51 and 611.17 is: 843.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.01 : 1,400.51 = 611.17 : x
  2. Step 2: Convert to fraction form
    1,015.01/1,400.51 = 611.17/x
  3. Step 3: Cross multiply
    1,015.01x = 1,400.51 × 611.17
  4. Step 4: Simplify right side
    1,015.01x = 855,939.64
  5. Step 5: Solve for x
    x = 855,939.64/1,015.01
  6. Step 6: Final answer
    x = 843.28

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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.