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Finding the Fourth Proportional to 943.36, 1,300.92 and 663.50

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Solution

The fourth proportional to 943.36, 1,300.92 and 663.50 is: 914.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.36 : 1,300.92 = 663.50 : x
  2. Step 2: Convert to fraction form
    943.36/1,300.92 = 663.50/x
  3. Step 3: Cross multiply
    943.36x = 1,300.92 × 663.50
  4. Step 4: Simplify right side
    943.36x = 863,160.42
  5. Step 5: Solve for x
    x = 863,160.42/943.36
  6. Step 6: Final answer
    x = 914.99

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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.