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Finding the Fourth Proportional to 694.99, 1,043.45 and 618.45

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Solution

The fourth proportional to 694.99, 1,043.45 and 618.45 is: 928.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.99 : 1,043.45 = 618.45 : x
  2. Step 2: Convert to fraction form
    694.99/1,043.45 = 618.45/x
  3. Step 3: Cross multiply
    694.99x = 1,043.45 × 618.45
  4. Step 4: Simplify right side
    694.99x = 645,316.97
  5. Step 5: Solve for x
    x = 645,316.97/694.99
  6. Step 6: Final answer
    x = 928.53

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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.