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Finding the Fourth Proportional to 943.45, 1,415.10 and 637.27

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Solution

The fourth proportional to 943.45, 1,415.10 and 637.27 is: 955.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.45 : 1,415.10 = 637.27 : x
  2. Step 2: Convert to fraction form
    943.45/1,415.10 = 637.27/x
  3. Step 3: Cross multiply
    943.45x = 1,415.10 × 637.27
  4. Step 4: Simplify right side
    943.45x = 901,794.25
  5. Step 5: Solve for x
    x = 901,794.25/943.45
  6. Step 6: Final answer
    x = 955.85

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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.