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Finding the Fourth Proportional to 774.54, 1,162.32 and 409.59

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Solution

The fourth proportional to 774.54, 1,162.32 and 409.59 is: 614.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.54 : 1,162.32 = 409.59 : x
  2. Step 2: Convert to fraction form
    774.54/1,162.32 = 409.59/x
  3. Step 3: Cross multiply
    774.54x = 1,162.32 × 409.59
  4. Step 4: Simplify right side
    774.54x = 476,074.65
  5. Step 5: Solve for x
    x = 476,074.65/774.54
  6. Step 6: Final answer
    x = 614.65

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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.