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Finding the Fourth Proportional to 1,007.11, 1,389.93 and 614.03

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Solution

The fourth proportional to 1,007.11, 1,389.93 and 614.03 is: 847.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.11 : 1,389.93 = 614.03 : x
  2. Step 2: Convert to fraction form
    1,007.11/1,389.93 = 614.03/x
  3. Step 3: Cross multiply
    1,007.11x = 1,389.93 × 614.03
  4. Step 4: Simplify right side
    1,007.11x = 853,458.72
  5. Step 5: Solve for x
    x = 853,458.72/1,007.11
  6. Step 6: Final answer
    x = 847.44

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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.