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Finding the Fourth Proportional to 1,003.67, 1,385.39 and 704.99

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Solution

The fourth proportional to 1,003.67, 1,385.39 and 704.99 is: 973.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.67 : 1,385.39 = 704.99 : x
  2. Step 2: Convert to fraction form
    1,003.67/1,385.39 = 704.99/x
  3. Step 3: Cross multiply
    1,003.67x = 1,385.39 × 704.99
  4. Step 4: Simplify right side
    1,003.67x = 976,689.56
  5. Step 5: Solve for x
    x = 976,689.56/1,003.67
  6. Step 6: Final answer
    x = 973.11

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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.