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Finding the Fourth Proportional to 1,649.86, 2,476.14 and 1,128.58

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Solution

The fourth proportional to 1,649.86, 2,476.14 and 1,128.58 is: 1,693.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,649.86 : 2,476.14 = 1,128.58 : x
  2. Step 2: Convert to fraction form
    1,649.86/2,476.14 = 1,128.58/x
  3. Step 3: Cross multiply
    1,649.86x = 2,476.14 × 1,128.58
  4. Step 4: Simplify right side
    1,649.86x = 2,794,522.08
  5. Step 5: Solve for x
    x = 2,794,522.08/1,649.86
  6. Step 6: Final answer
    x = 1,693.79

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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.