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Finding the Fourth Proportional to 1,043.38, 1,438.77 and 693.46

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Solution

The fourth proportional to 1,043.38, 1,438.77 and 693.46 is: 956.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.38 : 1,438.77 = 693.46 : x
  2. Step 2: Convert to fraction form
    1,043.38/1,438.77 = 693.46/x
  3. Step 3: Cross multiply
    1,043.38x = 1,438.77 × 693.46
  4. Step 4: Simplify right side
    1,043.38x = 997,729.44
  5. Step 5: Solve for x
    x = 997,729.44/1,043.38
  6. Step 6: Final answer
    x = 956.25

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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.