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Finding the Fourth Proportional to 1,571.55, 2,356.14 and 955.09

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Solution

The fourth proportional to 1,571.55, 2,356.14 and 955.09 is: 1,431.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.55 : 2,356.14 = 955.09 : x
  2. Step 2: Convert to fraction form
    1,571.55/2,356.14 = 955.09/x
  3. Step 3: Cross multiply
    1,571.55x = 2,356.14 × 955.09
  4. Step 4: Simplify right side
    1,571.55x = 2,250,326.91
  5. Step 5: Solve for x
    x = 2,250,326.91/1,571.55
  6. Step 6: Final answer
    x = 1,431.91

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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.