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Finding the Fourth Proportional to 1,003.86, 1,385.01 and 693.54

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Solution

The fourth proportional to 1,003.86, 1,385.01 and 693.54 is: 956.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.86 : 1,385.01 = 693.54 : x
  2. Step 2: Convert to fraction form
    1,003.86/1,385.01 = 693.54/x
  3. Step 3: Cross multiply
    1,003.86x = 1,385.01 × 693.54
  4. Step 4: Simplify right side
    1,003.86x = 960,559.84
  5. Step 5: Solve for x
    x = 960,559.84/1,003.86
  6. Step 6: Final answer
    x = 956.87

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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.