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Finding the Fourth Proportional to 1,455.36, 2,007.74 and 865.56

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Solution

The fourth proportional to 1,455.36, 2,007.74 and 865.56 is: 1,194.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.36 : 2,007.74 = 865.56 : x
  2. Step 2: Convert to fraction form
    1,455.36/2,007.74 = 865.56/x
  3. Step 3: Cross multiply
    1,455.36x = 2,007.74 × 865.56
  4. Step 4: Simplify right side
    1,455.36x = 1,737,815.11
  5. Step 5: Solve for x
    x = 1,737,815.11/1,455.36
  6. Step 6: Final answer
    x = 1,194.08

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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.