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Finding the Fourth Proportional to 1,176.69, 1,623.80 and 679.29

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Solution

The fourth proportional to 1,176.69, 1,623.80 and 679.29 is: 937.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.69 : 1,623.80 = 679.29 : x
  2. Step 2: Convert to fraction form
    1,176.69/1,623.80 = 679.29/x
  3. Step 3: Cross multiply
    1,176.69x = 1,623.80 × 679.29
  4. Step 4: Simplify right side
    1,176.69x = 1,103,031.10
  5. Step 5: Solve for x
    x = 1,103,031.10/1,176.69
  6. Step 6: Final answer
    x = 937.40

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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.