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Finding the Fourth Proportional to 1,006.81, 1,389.50 and 614.23

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Solution

The fourth proportional to 1,006.81, 1,389.50 and 614.23 is: 847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.81 : 1,389.50 = 614.23 : x
  2. Step 2: Convert to fraction form
    1,006.81/1,389.50 = 614.23/x
  3. Step 3: Cross multiply
    1,006.81x = 1,389.50 × 614.23
  4. Step 4: Simplify right side
    1,006.81x = 853,469.51
  5. Step 5: Solve for x
    x = 853,469.51/1,006.81
  6. Step 6: Final answer
    x = 847.70

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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.