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Finding the Fourth Proportional to 1,216.74, 1,825.56 and 436.80

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Solution

The fourth proportional to 1,216.74, 1,825.56 and 436.80 is: 655.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.74 : 1,825.56 = 436.80 : x
  2. Step 2: Convert to fraction form
    1,216.74/1,825.56 = 436.80/x
  3. Step 3: Cross multiply
    1,216.74x = 1,825.56 × 436.80
  4. Step 4: Simplify right side
    1,216.74x = 797,404.61
  5. Step 5: Solve for x
    x = 797,404.61/1,216.74
  6. Step 6: Final answer
    x = 655.36

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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.