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Finding the Fourth Proportional to 1,623, 2,239.68 and 914.86

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Solution

The fourth proportional to 1,623, 2,239.68 and 914.86 is: 1,262.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623 : 2,239.68 = 914.86 : x
  2. Step 2: Convert to fraction form
    1,623/2,239.68 = 914.86/x
  3. Step 3: Cross multiply
    1,623x = 2,239.68 × 914.86
  4. Step 4: Simplify right side
    1,623x = 2,048,993.64
  5. Step 5: Solve for x
    x = 2,048,993.64/1,623
  6. Step 6: Final answer
    x = 1,262.47

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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.