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Finding the Fourth Proportional to 1,164.13, 1,746.79 and 774.39

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Solution

The fourth proportional to 1,164.13, 1,746.79 and 774.39 is: 1,161.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.13 : 1,746.79 = 774.39 : x
  2. Step 2: Convert to fraction form
    1,164.13/1,746.79 = 774.39/x
  3. Step 3: Cross multiply
    1,164.13x = 1,746.79 × 774.39
  4. Step 4: Simplify right side
    1,164.13x = 1,352,696.71
  5. Step 5: Solve for x
    x = 1,352,696.71/1,164.13
  6. Step 6: Final answer
    x = 1,161.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.